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ULANZI TB15 Double-ended Magic Arm with 1/4" & 3/8" Threads
Product Description
The ULANZI TB15 Double-Ended Magic Arm (Model: TB15) is a multi-directional connector that holds cameras, lights, monitors, or microphones in precise positions. Commonly used in conjunction with heavy-duty super clamps (sold separately). The 200mm long arm has a 3/8"-16 male stud on one end and a 1/4"-20 male stud on the other, with a ball joint behind each one, so both ends angle freely and then lock solidly together.
Because the two ends of the Magic Arm are different-size threads, you match the end your gear needs first, then put the other end into a clamp that takes it. Our ULANZI HD02 Super Clamp (sold separately) takes either.
Both ball joints rotate 360° and tilt 90°, and a single knob on the side of the body locks them both at once. Set the angle at each end, turn the knob, and it holds tight.
Each end plate carries spring-loaded ARRI locating pins. On gear with ARRI holes beside its thread, the pins drop in, and the joint cannot rotate; on gear without them, the pins simply push down out of the way. Our ULANZI HD02 Super Clamp (sold separately) has two ARRI holes beside every thread, so the TB15 screws in and keys in at the same time.
A knurled wheel sits in each end plate and drives the stud in and out, which means you tighten the connection by turning the wheel instead of spinning the whole arm. In a tight rig, or with something already mounted on the far end, that is the difference between a quick change and an awkward one.
Along the body there are four more thread holes: a 1/4"-20 and a 3/8"-16 on each of two adjacent faces, every one with two ARRI locating holes beside it, for mounting extra accessories off the arm itself.
The Six Threads:
| Where: | What It Is |
| 3/8"-16, one end | Male stud, driven by the end wheel, with spring-loaded ARRI pins in the plate |
| 1/4"-20, the other end | Male stud, driven by the end wheel, with spring-loaded ARRI pins in the plate |
| 1/4"-20 and 3/8"-16, one body face | Two female threads together, each with two ARRI locating holes beside it |
| 1/4"-20 and 3/8"-16, the next body face | The same pair again on the face around the corner, not the one opposite |
The two threaded faces are adjacent rather than opposite, so two accessories hung off the body sit at right angles to each other instead of back to back. Either face gives you a 1/4" and a 3/8" to choose from without moving the arm.
Fully straightened the arm measures 200mm end to end and weighs 300g, and it is rated to 3kg, the same figure as our HD02 Super Clamp, so the two together have one ceiling rather than two.
Key Features:
- The Bridge Between Clamp and Camera: Male studs at both ends join two female threads that cannot join on their own.
- 3/8" One End, 1/4" the Other: Match the end your camera, light or monitor needs first, and the other end goes into the clamp.
- One Knob Locks Both Ends: Two ball joints, each rotating 360° and tilting 90°, held by a single knob on the body.
- Tighten Without Turning the Arm: A knurled wheel in each end plate drives the stud in and out, so nothing has to be spun into place.
- Spring-Loaded ARRI Pins: Pins in both end plates drop into ARRI holes to stop the joint rotating, and push flat on gear that has none.
- Four More Threads on the Body: A 1/4"-20 and a 3/8"-16 on each of two adjacent faces, all with ARRI holes, for a light, recorder or mic.
Specifications:
- Type: Double-ended magic arm with a ball joint at each end
- Length: 200mm fully straightened
- Weight: 300g
- Load Capacity: 3kg
- Threads in Total: 6, made up of 2 male studs on the ends and 4 female threads along the body
- End Studs: 1 x 3/8"-16 male and 1 x 1/4"-20 male, each driven by a knurled wheel in the end plate
- Body Threads: 2 x 1/4"-20 and 2 x 3/8"-16 female, arranged as one of each on two adjacent faces, every one with 2 ARRI locating holes
- ARRI Pins: Spring-loaded, in both end plates, independent of the stud wheels
- Ball Movement: 360° rotation and 90° tilt at each end
- Locking: One knob on the body locks both ball joints together
- Manufacturer Dimensions: 21 x 4.8 x 3cm, the 4.8cm measured across the locking knob
- Material: Aluminium alloy with metal hardware
- Colour: Black
- Packaging: Ulanzi label the retail box Magic Arm Pro, which is the same product
What's Included?
- 1 x ULANZI TB15 Double-Ended Magic Arm
- 1 x Allen Key
What is Not Included? Super clamps, suction cups, tripods, 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 Care & Warranty Exclusions
- You Need Something to Mount It To: The TB15 is one half of a mounting chain. A super clamp, suction cup, stand or cage is NOT included and is required to use it.
- One Knob Means Both Ends: There is a single locking knob. Loosen it to re-angle the camera end and the other end goes slack at the same time. Take the weight before you loosen it, and never loosen it with gear hanging unsupported.
- The Reach is Fixed: The centre body is rigid. The arm angles at the two ends only, so 200mm straightened is the reach. It will NOT fold or snake around an obstacle the way a three-section arm does.
- 3kg is the Total: That is everything the arm carries, including anything hung off the body threads. The further a load sits from the ball, the harder the joint works, so treat 3kg as a ceiling rather than a target.
- Match the Thread Before You Order: One end is 3/8"-16 and the other is 1/4"-20. Check what your clamp and your gear actually take. Do NOT force a stud into the wrong thread.
- Tighten It and Test It: Lock the knob fully, drive each stud home with its wheel, and give the arm a firm pull before you let go of your gear, every time. Re-check it if the setup gets moved or knocked.
- Not for Overhead or Over People: Do NOT rig anything above where people are standing or sitting without an independent safety tether. An arm 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: Magic Arm
Manufacturer SKU: TB15
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.