The ProMaster Dovetail QR Clamp Kit is a great way of adding an Arca-type quick release to a tripod, head, grip item, or other piece of equipment. It uses a 3/8"-16 threaded port and includes a 1/4"- 20 adapter. The clamp body also has three strap slots, so it can be used as a quick release system for a shoulder strap. 

This kit includes a ProMaster 50mm Quick Release Plate (1816) which incorporate two removable safety bolts to prevent it from accidentally sliding out of the clamp. 

• Clamp Dimensions: 18.5 mm high x 80.5 mm long (including QR knob) x 38 mm wide. (clamp is 14.5mm high w/o QR knob included in this dimension)
• Clamp Weight: 2 1/4 oz / 64 g
• QR Plate Dimensions: 50 mm long x 38 mm wide
• QR Plate Weight: 1 1/8 oz / 32 g