With these nuts & agrave; claws, furniture legs, furniture rollers or set screws are firmly screwed in. They close linearly with the surface after assembly. The four tips prevent the nut from twisting. Assembly: The nuts are mounted in the previously drilled component. with a hammer. Thanks to the four claws, the nut is fixed; deeper into the material work. Thus we give life & agrave; a screwed fitting; additional and secure. Composition of four T-nuts: M3 20 Pieces M4 20 Pieces M5 20 Pieces M6 15 pieces M8 15 pieces Specifications: -Color: silver -Weight: 202g & nbsp; -Material: Carbon steel plated zinc