Powerbuilt XT90 sealed head professional grade ratchets are constructed of premium Chrome Vanadium (CR-V) steel with a mirror-polished chrome-plated finish. The solid forged fully-sealed heads keeps lubricant in and debris out. The XT90 ratchets requires just a 4° swing to engage, making them ideal for the tightest spaces in the engine bay. With an ergonomic full-length handle that is weighted for great balance and feel, offset to provide extra knuckle clearance, and with molded finger grooves that offer maximum control, comfort and grip, these ratchets are the most durable in the Powerbuilt line. Precision crafted to exceed ANSI standards for torque, reverse torque and tolerance.