STRONG AND DURABLE -- Higher quality, made from heat-treated chrome-vanadium steel for durable and long time use. FLEXIBLE HEADS & Extendable -- 180-degree flexible head that allows you to easily reach fasteners at almost any angle. Provides a longer reach and increased torque, 6.7 to 8.6 inches (170 to 220 mm). QUICK RELEASE -- A quick-release button on the back of the ratchet head allows effortless socket removal. 72-TOOTH MECHANISM -- 72-tooth reversible ratcheting mechanism that only needs a 5-degree arc to operate and drive direction. COMFORT GRIP HANDLE -- Each ratchet has a comfort grip chemical resistant handle made with TPR rubber overmold.