Lifting straps are worn around the wrist and wrapped tightly around the bar. They are usually made out of a heavy cloth and have an open loop at one end, so a loop may be made and your hand placed through it. This allow you to lift more weight than your grip can handle. Usually done while working the back, such as deadlifts, various rows, pull-[ups/downs], and sometimes curls. Treat these similar to lifting belts. Use them as a lifting aid for your heavy sets. Do plenty of lighter sets to help improve your grip and forearm strength.