The CD40 40 mm Back-to-Back Quick Release Clamps from ProMediaGear are two Arca-Swiss type compatible 40 mm clamps that mount at either 90º or 180º to each other. Together they can be used for paralax offset or other slide rail applications; they can also be used separately. Precision machined aluminum alloy instruments, they provide a hard coated black anodized surface and nickel-chrome plated insert to ensure that the threads remain in good condition. The clamps include 1/4"-20 and two 3/8"-16 inserts as well as mounting screws, wrenches and pins.

Arca-Swiss Type Compatible    Anodized Aluminum Alloy    Nickel-Chrome Plated Insert    Large Knobs    Includes 1/4"-20 and 3/8"-16 Inserts    Made in the U.S.A.

Related Questions and Answers

Q: 1. This plate can hold a Manfrotto 200PL (instead of an arca type)?

A: Technically, no. It is meant to hold an arca-swiss plate.However, you might be able to use a dual-style plate like the Peak Design Arca/200PL dual plate (https://bhpho.to/3kBB3ZA) which claims to work in both arca-swiss and Manfrotto RC2.

Q: 2. If the screws aren't for moving the strap loops will the plate work properly without them since they might scratch surfaces?

A: The screws are there as a safety measure. Properly adjusted, they will allow you to move the plate in a loosely tightened clamp without letting the plate slide out completely. The plate will work without them, but if your camp is designed to accommodate them I highly recommend you leave them in place.

Q: 3. Does it fits Canon 77D?

A: Yes. The plate will fit the Canon 77D and is an Arca Compatible Mounting Plate. The plate features a standard 1/4-20 camera screw that adjusts up/down on the bottom your camera for optimal fit and is Universal.

Q: 4. can i use this product on a Vanguard SBH-100?

A: They had a shipment from Pro Media where the insert was fitted with Loc Tite so you could not remove it, beware

Q: 5. How heavy is this?

A: This item weighs 4oz.

Q: 6. Will this clamp screw right on to the stem of a 488rc2? Will the oem manfrotto clamp screw off the stem?

A: The 488RC2 has a 3/8 -16 stem. The C60 clamp will not fit directly. You need a different insert (C3816INSERT) from promediagear. I did not like the quality, knob rotation is rough, mounting surface wasn't flat.

Q: 7. Will this fit on a Manfrotto head that uses 501PL quick release plate?

A: The PX3 and PBX3 plates are built around the Arca-Swiss platform. The 501 plate series are slightly different. They are not compatible.

Q: 8. Does this product fits a Hasselblad H4D-50? I will use it in conjunction with an Arca-Swiss C1 with Flip-lock.

A: Yes, you can use this plate on a H4D-50.

Q: 9. Will this adapter work to convert a Gitzo G2272M head to Arca Swiss L bracket?

A: No, the gitzo quick release receiver is incompatible with the manfrotto 501 series plates that ProMedia uses on this adapter. You could consider attaching an adapter like Kirk QRC-2.6 Arca-Type Quick Release Clamp to your Gitzo quick release plate by way of the 1/4" thread you would normally attach to your camera. You'll also need a 1/4" to 3/8" Tripod Adapter/Bushing. This is not an ideal solution because you can still get loosening and twist where the Gitzo plate attaches to the Kirk adapter.

Q: 10. Will this work with a Gitzo G2272M head to Arca Swiss L Bracket on a Nikon D850?

A: No, the gitzo quick release receiver is incompatible with the manfrotto 501 series plates that ProMedia uses on this adapter. You could consider attaching an adapter like Kirk QRC-2.6 Arca-Type Quick Release Clamp to your Gitzo quick release plate by way of the 1/4" thread you would normally attach to your camera. You'll also need a 1/4" to 3/8" Tripod Adapter/Bushing. This is not an ideal solution because you can still get loosening and twist where the Gitzo plate attaches to the Kirk adapter. If you need a 3 way pan and tilt head that's Arca compatible consider Induro PHQ1 and PHQ3 heads.