... 1.material: brass,steel,aluminum 2.surface: zinc,nickel,chrome 3.free sample 4.after-sales service Specifications of steel Semi ... 1) Open 2) Closed3 Material 1) Steel 2) Brass4 Diameter: 3.2mm, 4.0mm, 4.8mm, 6.4mm, (1/8'', 5 ... /32'', 3/16'', 1/4'')5 Length: 6mm - 30mm6 Head type: dome ... .35 / 10.975.74 / 5.675.73.813.964.16546.02 / 5.8913.00 / 12.576.30 / 6.236.34.224 ...