• Thin ends for better access in narrow areas
• The openings are machined to precision for a perfect fit with nuts and bolts
• High-quality molybdenum-vanadium steel alloy and controlled thermal-treatment
• Exceed ASME B107.100 standard

Open-end wrenches has 2 mouths of different sizes on the same key. The smaller the opening of the wrench mouth, the shorter the body of the wrench, this is in proportion to the maximum lever arm that can be applied to the head of the screw or nut. By having two different measurements in a wrench, the number of tools needed to do a job is reduced.