for hexagon socket screws (inch)
precisely chamfered edges, ensures easy insertion into screws
special alloy based on spring steel, exceptional elasticity coupled with with high hardness
laser-marked serial number, lifetime guarantee 1/20, 1/16, 5/64, 3/32, 7/64, 1/8, 9/64, 5/32, 3/16, 7/32, 1/4, 5/16