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: 3/8”. Total length: 6″. Outside diameter open end: 51/64″. Outside diameter box end: 19/32″. Head thickness open end: 15/64″. Head thickness box end: 5/16″.