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ULANZI EA03-CO83 Super Clamp + Two-Section Magic Arm + Phone Holder
Product Description
The ULANZI EA03-CO83 Super Clamp + Two-Section Magic Arm + Phone Holder (Model: EA03-CO83) is the complete kit. The clamp grips a desk edge, a handrail, a bike handlebar, a tree branch or a tripod leg, and the arm reaches out from it to put a camera, light, monitor or microphone exactly where you want it — anything with a female 1/4" socket screws straight onto the end. The included phone holder adds smartphones to that list, so there is nothing else to buy.
The arm extends to 38.5cm. Two sections and three double-ended joints — one at the clamp, one in the middle, one at the business end — so it reaches across a desk, over a worktop or down onto a page from well outside the frame.
Each joint is a pair of ball heads on its own large lock knob. That is six points of articulation on three controls, and it means you can re-angle the camera end while the rest of the arm stays exactly where you set it.
The free end is a 1/4"-20 male screw, and the phone holder has two 1/4" holes of its own — one underneath and one at the back — so the arm can come up from below or in from the side.
Three Y-shaped jaws wind in and out on a single knob that then tightens them down; each jaw has a swivel foot, and the feet and the jaw faces are rubber-lined so the clamp holds without marking what it is gripping.
There is no minimum. The three jaws interleave and close past each other, so thinner objects such as a monitor bezel, a thin shelf, a picture rail or a narrow rod are held just as securely as something thicker.
The feet swing clear for extra range. With the pads down, the clamp takes a flat edge up to 40mm or a round tube up to 45mm. Swing the three feet out of the way, and the jaws themselves do the gripping, taking 50mm flat or 55mm round. The jaw faces are rubber-lined too, so you are still clamping on rubber either way.
Will It Fit? Measure What You Are Clamping To:
| Surface: | Feet Down | Feet Swung Away |
| Flat — desk edge, shelf, monitor frame, headboard | Up to 40mm thick | Up to 50mm thick |
| Round — handrail, banister, light stand, handlebar, branch, tripod leg | Up to 45mm across | Up to 55mm across |
| Minimum | None | None |
| Load | Up to 1kg | Up to 1kg |
1kg is the figure to plan around, and it is the total for everything on the clamp at once. That is a phone, an action camera, a compact camera, a small monitor, a video light or a microphone — not a mirrorless body with a lens on it, and certainly not a DSLR.
The further the arm goes out, the harder the clamp works. A load held at full 38.5cm extension puts several times more leverage on the jaws than the same load held close in, so treat 1kg as a ceiling that shrinks as you extend, not a figure you can rely on at arm's length.
The Mounting Points:
| Where: | What Attaches |
| 1/4"-20 male screw — free end of the arm | The included phone holder, or your camera, light or monitor, or a tripod adapter — anything with a female 1/4" socket |
| 2 x 1/4"-20 — on the phone holder | One underneath and one at the back, so the arm can approach from below or from the side |
| 1/4"-20 — at the back of the clamp | Taken by the magic arm. The arm unscrews if you want this point free, but it is fitted tight from the factory |
| 1/4"-20 — under the single jaw | A second keyed point at a different angle, with two ARRI locating holes |
| 1/4"-20 — left and right sides | Two plain threads with no ARRI holes |
| Cold shoe — underneath, on the angled section | A light, microphone or monitor with a standard shoe foot, sliding straight in with nothing in between |
The spare clamp threads are all female, so anything added there needs a male 1/4" thread of its own. Whatever is mounted, the 1kg rating is the total for the arm, the phone holder, the cold shoe and every thread combined.
Key Features:
- Everything in One Box: Clamp, two-section magic arm and phone holder — nothing else to buy to mount a phone.
- Reaches 38.5cm: Two sections get the camera out across a desk, over a worktop or down onto a page.
- Three Joints, Three Knobs: Six ball heads on three separate locks, so you can re-angle one end without the rest going slack.
- Phone Holder Mounts Two Ways: A 1/4" thread underneath and another at the back, for an arm coming from below or from the side.
- No Minimum Thickness: The three jaws close past each other, so a monitor bezel, a thin shelf or a narrow rod is held as firmly as a thick rail.
- Feet Swing Clear for More Range: 40mm flat and 45mm round with the pads down, 50mm and 55mm with the feet out of the way.
Camera Brand & Model Compatibility:
| Direct Fit — Native 1/4"-20 Thread: | How It Connects |
| Insta360 X6, X5, X4, X4 AIR, X3, ONE X2, ONE X, ONE | Screws directly onto the magic arm's 1/4"-20 screw — no adapter needed |
| DJI Osmo 360 | Screws directly onto the magic arm's 1/4"-20 screw — no adapter needed |
| GoPro HERO12, HERO13, Lit HERO, Mission1, Mission1 Pro, Mission1 Pro ILS, MAX2 | Built-in 1/4"-20 thread screws directly onto the magic arm — no adapter needed |
| Direct Fit — Using your own Finger Adapter: | How It Connects |
| Insta360 ONE R, ONE RS | Camera's own finger frame and Tripod/Finger adapter connect directly — no additional purchase needed |
| Compatible with an Additional Tripod/Finger Adapter (sold separately): | What It Has Now | What It Needs |
| GoPro HD Hero, Hero2, HERO3, HERO3+, HERO4 Black/Silver, HERO5 Black, HERO6, HERO7 Black/Silver/White, HERO+, HERO+ LCD, HERO (2014), HERO (2018), Session4, Session5 | Original GoPro Finger Mounts on its Waterproof Housing/Frame | Tripod Adapter — sold separately — Shop NOW - HG02 (Budget) / Shop NOW - GoPro197 (Premium) |
| GoPro HERO8, HERO9, HERO10, HERO11 Black, HERO11 Mini, HERO (2024) | Built-in folding fingers | Tripod Adapter — sold separately — Shop NOW - HG02 (Budget) / Shop NOW - GoPro197 (Premium) |
| GoPro MAX, Fusion | Built-in GoPro Finger Mount | Tripod Adapter — sold separately — Shop NOW - HG02 (Budget) / Shop NOW - GoPro197 (Premium) |
| DJI Osmo Action1 | Original Frame with GoPro-style fingers | Tripod Adapter — sold separately — Shop NOW - HG02 (Budget) / Shop NOW - GoPro197 (Premium) |
| DJI Osmo Action2/3/4/5/6 | Included Magnetic-to-GoPro-style Finger Mount | Tripod Adapter — sold separately — Shop NOW - HG02 (Budget) / Shop NOW - GoPro197 (Premium) |
| Insta360 ACE, ACE Pro & ACE Pro2 | Included Magnetic-to-GoPro-style Finger Mount | Tripod Adapter — sold separately — Shop NOW - HG02 (Budget) / Shop NOW - GoPro197 (Premium) |
Note: Ensure all connections are fully tightened and secure before use. WARNING: High-vibration or impactful activities pose a higher risk of mount failure and should be avoided.
Specifications:
- Clamp Type: Y-shaped three-jaw clamp, hand tightened
- Adjustment: One knob winds the jaws in and out and then tightens them down
- Jaws: 3, each carried on a swivel foot that can be swung clear
- Flat Clamping: No minimum, up to 40mm with the feet down or 50mm with them swung away
- Round Clamping: No minimum, up to 45mm with the feet down or 55mm with them swung away
- Load Capacity: 1kg total
- Magic Arm: Two sections, three double-ended joints, six ball heads, three lock knobs
- Magic Arm Reach: Up to 38.5cm extended
- Arm Threads: 1/4"-20 male at both ends. The clamp end is fitted tight from the factory
- Phone Holder: 2 x 1/4"-20 female, one underneath and one at the back
- Clamp Threaded Mounts: 4 x 1/4"-20, all female. One used by the magic arm. Two with 2 ARRI locating holes each, two plain
- Cold Shoe: 1, underneath on the angled section
- Gripping Surfaces: Rubber lined on the three feet and on the jaw faces
- Material: Metal with rubber linings
- Weight: 455g as supplied — clamp 175g, arm 248g, phone holder 32g
- Colour: Black
What's Included?
- 1 x ULANZI EA03-CO83 Super Clamp with Two-Section Magic Arm (arm pre-fitted)
- 1 x Phone Holder
What is Not Included? Tripod adapters, cameras, monitors, lights and other accessories not listed may be shown in images for demonstration purposes ONLY and are NOT included.
Buy with Confidence: Hero Gear is an Authorised Reseller for all brands we stock in Australia. Standard Postage Australia-Wide is already included in the price of every item. Items are covered by a 12-month Australian Warranty and are shipped directly from our Hunter Valley, NSW, warehouse.
⚠️ Important Notes, Care & Warranty Exclusions
- 1kg is the Total, and It is Low: That is everything the clamp carries at once — the camera on the arm, anything in the cold shoe and anything on the spare threads, NOT 1kg per mounting point. A mirrorless body with a lens is usually OVER 1kg and a DSLR is well over. Do NOT put one on this clamp, whatever you may read elsewhere.
- Action Cameras with Finger Mounts Need a Tripod Adapter: GoPro-style finger mounts do NOT screw onto the arm. A Tripod Adapter is required and is NOT included — see the compatibility tables above.
- Phone Holder Required for Smartphones: A phone holder with a 1/4" socket is required to mount a smartphone — NOT included.
- Measure Before You Order: There is no minimum, but there is a maximum. 40mm flat and 45mm round with the feet down, 50mm and 55mm with them swung away. Measure what you are clamping to before you buy.
- What You Clamp To Matters as Much as the Clamp: A thin shelf, a plastic trim or a decorative moulding can flex or break under load even when the clamp itself is holding perfectly. Pick something solid.
- Do Not Overtighten on a Delicate Finish: The rubber grips well at moderate pressure. Cranking the knob down hard on polished timber, paintwork or a car interior risks leaving a mark.
- Tighten It and Test It: Hand-tighten the clamp knob and the arm knob fully and give the setup a firm pull before you let go of your gear, every time. Re-check it if the setup gets moved or knocked.
- Moving Vehicle Use: Always use a secondary safety tether when mounting on moving vehicles such as bikes or motorbikes. Hero Gear takes no responsibility for loss or damage caused by mount failure during vehicle use.
- Not for Overhead or Over People: Do NOT rig anything above where people are standing or sitting without an independent safety tether. A clamp is not a rigging point.
- Use at your own risk: Hero Gear is not responsible for loss or damage to cameras or equipment used in conjunction with this accessory.
- Warranty Coverage: Warranty covers manufacturing defects only. Damage resulting from use, misuse, accidents, falls, or any activity-related incident is NOT covered — regardless of the activity involved.
Need More Information?
For further details on how we get your order to you, or how we handle support, please visit our dedicated information pages:
- View our Shipping Policy
- View our Warranty Information
- View our Returns Policy
Have a specific question about this product? We are here to help! Please reach out to us via our Contact Us page.
Technical Compatibility and Specifications
Type: Mount: Clamp Mount with Magic Arm
Manufacturer SKU: EA03-CO83
Warranty
We are authorised Australian resellers, ensuring you receive genuine stock and local support. All products purchased from Hero Gear come with a standard 12-Month Australian Warranty.