Features Carbon Steel Material: These four-pronged T nuts are made from carbon steel and plated with zinc for rust and corrosion protection Mainly Used for: These nuts are used to provide a strong, reliable and easy to fit threaded socket in wood and chipboard Easy to Install : Convenient to use, simply tap these nuts into a suitably sized hole and the prongs will hold them in position Fasten on Projector: 4 Prongs ensure stable These four prongs will stop the T nut from turning when they are inserted and tightened into wood pieces Differnet Size Packaged: There are 5 different sizes nuts in this set that comes in a resealable assorted box for easy carry and storage Description: A T-nut is a type of nut used to fasten a wood, particle or composite materials workpiece, leaving a flush surface. It has a long, thin body and a flange at one end, resembling a T in profile. The flanges of T-nuts have prongs that dig into a wooden work piece as the bolt is tightened from the opposite side of the piece, providing better retention. Specifications: Material: Zinc plated carbon steel Color: Silver Size and Quantity: M3         20pcs M4         20pcs M5         20pcs M6         15pcs M8         15pcs Box Size: 13 x 6.5 x 2.3cm / 5.11 x 2.56 x 0.9" Package Includes: 1 set x T Nuts Package List