Impulse sterling is the official supplier for the chinese national weight lifting team the impulse sterling half rack is a great machine that will be able to perform many different exercise involving a lot of weight and strength based exercises as well as this you will also get the ability to do pull ups with the pull up bars on the top of the half rack with these you can either do wide grip or narrow grip to focus on the muscles you are trying to train in the best way warranty of the impuls