Crescent AT110BK Adjustable Wrench Black Oxide Finish, 10-Inch Wide capacity jaw allows each tool to work with more fastener sizes-1-5/16 Inch Jaw Opening Wider handle provides more comfort and less stress to the hand Tension spring stabilizes jaw and knurl adjusts easily Proportioned dimensions for greatest strength and minimum weight Alloy steel and heat treated, Black Oxide finish resists corrosion, Polished head and regular, non-slip grip handle