Main material: It is made of nylon material, which is simple, has good insulation performance, resistance to UV, corrosion and cold, is not easy to aging, has strong bearing capacity. Clamp Fastener type: R-Type. It is easy to use, just put the wire into the cable clip and fix it with a screw on the wall or the ground after tightening. It is convenient and quick to use. Package includes 50PCS x R-type cable clip, and 50PCS x matching mounting screws, enough quantity to manage many mess wires. It helps organize your cables in an orderly manner and keep them tidy and away from troublesome wires Package specification: Fit for cable diameter(D): 19.4mm ( 3/4 ), screw hole diameter(A): 4 mm( 0.16 ). Widely use: It is a kind of cable fasteners, can be applicable to computer cable, television cable, cable management.