Combination Wrench Set with Roll, 15-Piece (1/4 - 1 in.) BoltsandNuts.com The jaws are made of

The jaws are made of S45C steel that's hardened to 37–43 HRC with black oxide finish and a light coating of rust inhibitor

Part Number: assortment-kit-4581510 Pieces - Coarse Thread

Deep knurling provides grip for turning fasteners and grooves provide grip for attaching and removing sockets and accessories

steel and other metal drilling

Combination Wrench Set with Roll, 15-Piece (1/4 - 1 in.) BoltsandNuts.com The jaws are made ofAngled Open End To reduce the working swing arc in tight spaces, the open end is angled 15 degrees so the wrench can be flipped over with each rotation to engage the fastener twice as often 12 Point Box End Doubles the available access angles compared to a 6 point end Prevents Round Off In order to prevent rounding off fasteners, the box end is designed to contact and apply force to the sides of a fastener head and not the corners Offset Box End The