Snap-on’s mechanical torque wrenches are the industry standard when it comes to accuracy, performance and durability, says the company. These wrenches feature a rugged mechanical design, a variable rate torque spring to enhance accuracy and stability, and a lock ring spring for easy torque adjustment and engagement. The hardened secondary arm provides for years of calibration re-adjustments and a precisely drilled arm click makes for accuracy and balance. There is a large selection of torque ranges, with ±4% accuracy, and a genuine, sealed ratchet head. The wrenches comply with updated torque specifications