TEKTON Combination Wrench Set with Store and Go Keeper, Metric, 8 mm - 16 mm, 9-Piece | 18785 Open end is angled 15 degrees so the wrench can be flipped over to engage fasteners twice as often in tight spaces 12-point box end doubles the access angles of a 6-point and is offset 15 degrees to create clearance for fingers Box end opening is designed to grip flat sides of fastener heads, not corners, to prevent round-off Made of premium chrome vanadium steel with a mirror chrome finish Includes Store-and-Go Keeper with space-saving folding handle and nonslip grippers to lock in wrenches