【Type】Used on 20mm x 20mm, 10 series (1” x 1“ ) extrusion profile. 【Material】carbon steel,surface chrome finish. 【High Quality】T-Slot aluminum extrusion M5x8mm hardware slide in T-Nuts made from high quality carbon steel galvanized. Carbon steel hex socket button head bolts screws nuts surface chrome finish Anti-corrosion,rustless. 【Widely Used】Compatible with 20 series aluminum profile, such as CNC machine tools, industrial fences, production line operation tables, shelves and so on. 【What You Get】150Pcs M5 T-slot nuts+150Pcs black M5x8mm hex socket cap screw bolt;30-Days money back guarantee, 1-Year warranty, 24/7 friendly customer service.