Feature●Rust resistant and strength enough to apply in many kinds of heavy duty materials including sheet metal, steel, aluminum, plastic, fiberglass etc.●Perfect for automotive, furniture, decoration and other electrical and industrial products.●M3 Insertion Nut -T-Slot Nuts●For 3D Printer C-beam Machine●T-Slot Nuts For Aluminum Extrusion, 50pcsDescription M3 Insertion Nut -T-Slot Nuts For 3D Printer C-beam Machine T-Slot Nuts For Aluminum Extrusion, 50pcs