This stud wrench adjusts easily by squeezing and turning; it distributes equal force on all sides of the stud. Covers 5 SAE sizes: 1/2, 9/16, 5/8, 11/16, 3/4 inch, and 9 Metric sizes: 12, 13, 14, 15, 16, 17, 18, 19, 20mm.

Fully adjustable with a one-handed squeeze. Provides efficient ratcheting: release, then re-grip the object. Often removes nuts and bolts damaged by other tools.