The Schaefer 70-17 Fast Entry Cam Cleat is designed with die cast aluminum cams, Delrin(tm) ball bearings, and a computer designed high flare that allows for easy entry at various angles. It has a safe working load of 300lbs (135kg) and is compatible with line size 1/4" - 7/16" (6mm - 12mm). To install, you will need (2) #10 flat head fasteners and it has a center-to-center measurement of 1.5" (38mm), matching competitors' measurements.