Combination wrenches feature two same-size openings; the open-end allows you to quickly apply low torque and the box-end allows you to apply final and greater torque. The opening angle allows two actionable positions, reducing the recovery angle to 15°. Box-end: 30° recovery angle. Open-end: 15° recovery angle. The openings are machined to precision for a perfect fit with nuts and bolts. Oval handle for a more comfortable grip. Thin openings for better access in narrow areas. Opening size: 42 mm. Total length: 23-2/16”. Outside diameter open end: 3-1/64”. Outside diameter box end: 55.14″. Head thickness open end: 9/16″. Head thickness box end: 13/16″.