This is so easy to use -- no more guessing at stud sizes. This stud wrench adjusts easily by squeezing and turning; it distributes equal force on all sides of the stud. Will not slip, strip or round-off fasteners. It's easy on your knuckles, too. SAE/metric sizes covered: 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. Height: 6 inches, 152mm. Maximum Width: 4 inches, 102mm. Weight: 0.5 pounds, 227 grams. Steel: Hardened, cold-rolled, steel-laminate construction. Steel Coating: Industrial-quality, black-oxide finish resists rust, corrosion and chipping. Jaws: Hardened steel with environmentally friendly, corrosion resistant coating. Cushioned Grips: Double thickness for comfort. Technical: Meets or exceeds applicable ANSI standards. Manufacturing: Quality made in U.S.A. at ISO/TS 16949: 2002 facility. Guarantee: Forever.
