Zero degree offset for superior access even for recessed fasteners. Up to 40% longer to access those hard to reach fasteners. Ratcheting box end for maximum productivity. Improved box end reduces fastener rounding and adds strength. Precision broached for a perfect fit 12 piece XL GearBox Ratcheting Wrench Metric Set includes: 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, and 19mm. Slim head design will fit into restricted areas.