Package Content: 20pcs T-slot Drop-in Stud Sliding Bolts, 20pcs Hexagon Flange NutsMaterial: Carbon steel t slot nuts and bolts floor nickel finish, high hardness, wear resistance, corrosion resistance, and oxidation resistance, can effectively improve the service lifetime of carbon steel.Application: The t-slot drop-in bolt is fixed between the aluminum profile and the accessories and needs to be used with nuts. Widely used in aluminum alloy, rack assembly and clamping locks, t-slot tracks, etc. Also used in furnishings assembly, paper machines, etc. Most commonly utilized in lifting, metallurgy, mechanical equipment and gear mechanical kit assembly, debugging constant mechanical equipment, etc.Easy to Use: When purchasing, please verify the size of your aluminum profile or T-groove to make sure that it matches the size of our T-bolt. When installing, put the screw head into the profile groove and switch it ninety degrees to clamp it.