... brass,steel,aluminum 2.surface: zinc,nickel,chrome 3.free sample 4.after-sales service Specifications of ... 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 ... /161.63 / 1.553.43 / 3.231.73 / 1.681.70.991.041.141/16161.73 / 1. ... 653.43 / 3.231.83 / 1.781. ...