The QRC-3.18 Arca-Type 3.18" Quick Release Clamp with Classic Locking Knob from Kirk is a 3.18" long clamp that is compatible with most Arca-type quick release plates. The clamp is made of a combined aluminum alloy and stainless steel construction to provide long-lasting dependability. This 3.18" quick-release receiver features a classic locking knob with a large knurled design. The clamp design also insures that no internal mechanisms are exposed, improving the clamp's resiliency.

The clamp has also been engineered with safety stop relief grooves that provide improved safety when paired with Kirk camera plates. The clamp features a single spirit level to assist in proper leveling and centering lines for accurately positioning your camera within the clamp. A captive release knob has also been added to prevent the accidental loss of small internal parts and an internal slot has been added to hold the included 5/32 hex wrench.

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

Length: 3.18"    Arca-Type Compatible    3/8"-16 Bottom Thread    Aluminum & Steel Construction    Integrated Spirit Level    Captive Release Knob    Centering Lines & Degree Markings    Built-In Hex Wrench

Related Questions and Answers

Q: 1. What is the purpose of the little hole next to the mounting hole?

A: its a anti-rotation Pin drop.

Q: 2. Will this work with the Manfrotto 502AH Pro Video Head with Flat Base, will the adjusting nob on the clamp have enough clearance from the flat base on the video head for proper operation?

A: The Kirk QRC-4.2 Arca-Type 4.2" Quick Release Clamp with Classic Locking Knob won't allow you to move the knob as it will hit the top of the Manfrotto 502AH Pro Video Head with Flat Base. Because you're using this large video head, you would need the Kirk 4.2" Quick Release Clamp with Extended Knob (https://bhpho.to/3QXSKT2).

Q: 3. This Quick Release Clamp will work well with the Oben CTM-2500 Carbon Fiber Monopod?Thanks.

A: Yes. The Oben CTM-2500 5-Section Carbon Fiber Monopod comes with a reversible 3/8 -16 and 1/4 -20 mounting screw. The Acratech Arca-Type Quick Release Clamp also comes with a 3/8 -16 mounting thread and a 1/4 -20 adapter, so you can use it with either size mounting screw.

Q: 4. Is the clamp compatible with the Benro B5 head?

A: Unfortunately, Benro does not give information on how to change the included clamp to the Kirk QRC-4.2 Arca-Type 4.2" Quick Release Clamp with Classic Locking Knob. The size of the screw, threads of the screw, and even if it is interchangeable is not listed, unfortunately.

Q: 5. Can anyone explain the difference btw this model and the model that sells for $849? thanks.

A: The Arca-Swiss d4 Tripod Head with a Classic Knob Quick Release (Geared) B&H # ARD4QSCG MFR # 870103 uses a standard Arca-Swiss style plate.And the Arca-Swiss d4 Tripod Head with a MonoballFix Quick Release (Geared) B&H # ARD4MBFG MFR # 870105, uses the smaller plate specific for the Monballfix.

Q: 6. 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: 7. For real estate and geared head, do you think this would work better than the P0 hybrid?

A: Yes, more versatile head.

Q: 8. Is the knob also made out of aluminum? or is it plastic? other? Thank you.

A: The knob is plastic.Hard plastic very sturdy.This is an excellent clamp.I use it to fasten my Black rapid strap to my L bracket.

Q: 9. 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: 10. Will it be compatible with my 494 RC2 manfrotto ball head or I need an adapter?

A: Manfrotto has a notched stem. We have clamps that will work but they are not on the web.