Thumb screws,fasteners: 1)Size:M3 to M12, 1/4 to 1/2" 2)Thumb screws are made by cold heading 3)Material:mild steel,SUS304 Feature:1) Size: M3 to M12, 1/4 to 1/2"2) Thumb screws are made by cold heading3) Material: mild steel, SUS304Outer packing: Carton or poly bag + PalletOur company supply thrumb screws, screws, fastener. Thumb screws Fastener