Desmond brand DTB-60 : Arca-Swiss compatible QR plate. Twin Strap Bosses. 60mm (2.4") Long. 1 x 1/4"-20 screw (with both flat head screwdriver slot & 4mm hex socket). All metal (aluminum). Includes 2 x 2.5mm hex safety screws on the underside. Includes 2.5mm and 4mm allen wrenches Perfect fit for RRS Lever Clamps. Weight: 1.5oz (43g)