1、PREMIUM MATERIAL: This torsion limiting extension bar is made from chromium molybdenum steel, sturdy and durable. 2、FUNCTION: Drive size is compatible with impact drivers to limit torsion consistently and accurately to prevent lug nuts and fasteners from over torquing. 3、COLOR CODED: Each one is color coded with torsion limit specifications for easy identification and efficient work. 4、SECURE: With spring loaded ball to secure sockets, and ball hole at drive end to lock onto impact tool drive tangs to prevent dropping during operation. 5、PRACTICAL: This torsion limiting extension bar is very practical and useful hand tool, which provides more convenience. Item Type: Torsion Limiting Extension Bar Material: Chromium Molybdenum Steel Specification: 1/2in Square Mouth 150Ft-lbs(200Nm), 140Ft-lbs(190Nm), 130Ft-lbs(175Nm), 120Ft-lbs(160Nm), 110Ft-lbs(150Nm), 100Ft-lbs(135Nm), 90Ft-lbs(120Nm), 80Ft-lbs(110Nm), 75Ft-lbs(100Nm), 65Ft-lbs(90Nm). Application: Universal 10 x Torsion Limiting Extension Bar 1 x Toolkit