Check the listing for details. Sunwayfoto SDC-50 Duo Lever QR Clamp Arca / RRS Compatible. Condition: New. Listed at 29.95 USD. ✪T6061 grade aluminum main body, elaborately CNC machined with hard-anodized finish making it durable and resistant to abrasion and corrosion. Two way to lock, compatible with both Arca and Picatinny/Nato dovetail structure.✪Both the screw-knob and lever-lock can be used for tightening, which also provides better compatibility of different QR plates as well as quick-locking.✪Two groove standards: Arca and Pitcatinny/Nato dovetail structures✪Clamp width can be fine tuned to work with different Arca QR plates.✪Anti-slip block effectively avoids dropping of the loaded equipment under power shock.✪Arca mounting socket at the base of the clamp so it works with different tripods and ballheads.Model: SDC-50Duo-Lever ClampLength:2.9in./74mmWidth:2.4in./61 mmThickness:0.7in./1 9mmNet Weight:3.4oz./97gMounting socket diameter: 0.3in./7mm Brand New. In Original Box. All our items are in stock and ship from Oregon USA