16 piece set is made in the U.S.A., featuring SK's high polish SuperKrome finish, which protects the tools from the harsh working environments found in today's workplace, while providing long life and maximum corrosion resistance. The patented SureGrip wrenching design on wrench box ends, drives the side of the hex of the fastener, not the corner, to increase torque and avoid edge breakage, especially on rusted or damaged fasteners. Box ends are also countersunk to help lead the wrench over fastener heads. Heads are angled 15 degrees for greater access. Open ends also feature a smooth arc radius design for improved strength and durability. Handle edges are rounded for improved gripping and increased user comfort. Set Contents: 12Pt - 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 21mm, 22mm Wrenches. Packaged in a rack.