The 4.2" Square Lug Replacement Quick Release Clamp for Select KES Products from Kirk Enterprises is Arca-type compatible for compatibility with most plates on the market, and it has a 1/4"-20 mounting stud that mounts through the top of the clamp's female threads. The square lug located at the bottom of the clamp is compatible with the FR-2 Focusing Rail, the SRS-7 Slide Rail System, the MPA-2 Head, the QR-AB1 Universal Quick Release Adapter, and more.

The clamp is made of 6061-T6 aluminum with a silver and black anodized finish. This 4.2" quick-release receiver features an extended locking knob with a large, knurled design. The longer knob length makes it easier to use with larger cameras or camera rigs. Laser-engraved lines on the back of the clamp help to align the camera and sensor, and the clamp has a built-in hex wrench slide-in storage system.

NOTE: This clamp does not include a quick-release plate.

Arca-Type Compatible    Square Lug Mounting Hole    Laser-Engraved Sensor Lines    Silver and Black Anodized Finish    Built-In Hex Wrench Storage System    6061-T6 Aluminum Construction

• FR-2 Focusing Rail
• FR-3 Focusing Rail
• SRS-7 Slide Rail System
• MPA-2 Monopod Head
• QR-AB1 Universal Quick Release Adapter
• LRP-1 Multipurpose Rail (7.5")
• LRP-2 Multipurpose Rain (5.5")
• LRP-3 Multipurpose Rain (7.5")
• MVH500-BQR Quick Release System for Manfrotto MVH 500 Fluid Video Head
• MVH500-BQRV2 Quick Release System for Manfrotto MVH 500 Fluid Video Head

Related Questions and Answers

Q: 1. Can you change the Befree Live plate to arca-swiss?

A: No, the RC5 quick-release is integral to the BeFree Live fluid-head and not removable. If you want to us the fluid head then you'll have to use an adaptor block, like the Kirk QR-AB1QR, with the BeFree's RC5 camera plate.

Q: 2. I repeat my question to make it more understandable.I want to mount the 2.6 Kirk Quick Release Clamp on a DYH-90Ri Sunwayfoto leveling bracketI need to know: Is the Kirk 2.6 flat head screw 6mm or 1/4 ?Because the 3/8 to 1/4 adapter to be placed in the base of the leveling is standard, but a 3/8 to 6mm adapter must be made to measure

A: As per the manufacturer, the QRC-2.6CS is designed for tripod heads that have a raised key on the stem as well as 1/4 -20 or 6mm thread. With that being said, this clamp will not work on the DYH-90Ri. A more suitable clamp is the Desmond DAC-X1 50mm Quick Release Skeleton Clamp B&H # DEDACX1, which includes a 1/4 -20 bushing to fit the DYH-90Ri.

Q: 3. Will this Kirk Clamp work with the FEISOL PB-90 Panning Base ? do i need a reducer bushing or mounting hardware??

A: This clamp will go right on the PB90 head without any other parts.

Q: 4. Will this mount on an Arca Swiss P0? TIA

A: Sorry, no because the Kirk clamp has a threaded 3/8-16 hole and the Arca Swiss PO clamp has a M6 non-threaded hole.

Q: 5. Where can I purchase the centre bolt from please?

A: The Kirk 1.8" Quick Release Clamp is designed to go on tripods that do not have a quick-release clamp. The tripod will have the center bolt.

Q: 6. I recently bought sachtler FSB 8 Mark II , need to check will this plate will work with that ? i want to use my arca swiss plates with that.

A: The Kirk QRC-4.2 Arca-Type Quick Release Clamp can be screwed onto the plate that comes with the Sachtler FSB 8 MK II Fluid Head with Sideload Mechanism. With this screwed on top, on can attach arca type plates.

Q: 7. Is this for a 1/4 20 or 3/8 20 screw from below?

A: This has a 1/4"-20 Female threading.

Q: 8. Can this clamp be mounted flush to broad flush surface or will the knob impede that kind of mounting? I guess another way of asking the question is does the knob protrude below the bottom of the clamp?

A: No, it cant, ...yes, the knob protrudes below the bottom of the clamp

Q: 9. wull it be suitable for a nikon 200-500 lens?

A: Yes. This system clamps very well, and be sure to get quality clamps like Kirk as they are key to success.

Q: 10. The adapter relies on 1/4-20 studs (from below on the original mounting plate, and from the top on the arca swiss block) to hold the entire assembly...what are the weight/torque limits on this kind of set up? How much should one trust a single 1/4-20 stud to hold big glass?

A: I would say that if you feel that way, you should trust your expensive glass to double 1/4" or single 3/8".