Wrench is made of chrome vanadium steel with a chrome plated finish. Wrenches are forged and heat treated for greater strength. Handles are covered with a red transparent plastic for user comfort. The knurl is precision formed and the operation is smooth and trouble free. For accurate and faster adjustments use the metric or English scales on either side of the jaws. With extra wide jaws, a smaller wrench works on bigger jobs. Great for tight spaces.