Box ends are countersunk to help lead the wrench over fastener heads. Heads are angled 15deg 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 Contains: 12Pt - 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 29mm, 30mm, 32mm Wrenches. Packaged in a roll.