10 pc 12-Point Metric Combination Wrench Set (10-19 mm). Includes 10-19 mm wrenches in a storage tray. A continuous arc design distributes stress over the entire wrench opening radius for greater strength. Forged steel and heat treat hardness provides a superior wrench with the proper strength and durability while reducing wear and breakage. 7.5° offset broaching allows the user to flip the box end over to obtain a more advantageous grip on a fastener for restricted clearance areas.