JARD Quick-Attach Tri Pod Adaptor Black. to tripod or other holder systems. Adaptor clamps to M1913 rails offering a much more rigid stable connection compared to the bulky rifle saddle mounts on the market. The Adaptor measures 1.7" long requiring only three rail slots to mount. It features two holes for attachment: a 1/4-20 tapped hole or a 1/4" hole that accommodates 90 flat head screws allowing you to mount to basically any ball head on the market. Clamp travels from wide open to fully clamped in only 1.5 rotations of the clamp knob. The adaptor features a captive clamp which means you'll never have to fiddle with aligning the clamp or worry about losing it. Specifications for JARD Quick-Attach Tri Pod Adaptor: Manufacturer: JARD Color: Black Features of JARD Quick-Attach Tri Pod Adaptor Tripod Attachment: M1913 Rail Package Contents: JARD Quick-Attach Tri Pod Adaptor JARD 4924: Quick-Attach Tri Pod Adaptor Black