1、Use these torsion extension bars with an impact wrench to ensure consistently accurate torsion for your fasteners. 2、It's nice to have all your torsion extension bars in one place. It's not just convenient for storage, it's also an easy way to transport them from place to place. 3、These tools have a ball on the male end to help hold a socket. Spring loaded ball detent locks to prevent parts from slipping into machinery. 4、Made of high quality chrome molybdenum steel material, corrosion resistance, strong and durable, long service life. 5、Five 1/2in extension bars, including 140Ft-lbs(190Nm),120Ft-lbs(160Nm) ,100Ft-lbs(135Nm),80Ft-lbs(110Nm),65Ft-lbs(90Nm). Item Type: Extension Bar Material: Chrome Molybdenum Steel Color: White+Grey+Blue+Yellow+Green Specification: 1/2im square mouth 140Ft-lbs(190Nm) white 120Ft-lbs(160Nm) gray 100Ft-lbs(135Nm) blue 80Ft-lbs(110Nm) yellow 65Ft-lbs(90Nm) green Application: Universal 5 x Extension Bar 1 x Tool Box