The feed clip is much, much better than those sold in big stores. It actually locks in place and doesn't leak even when used to inflate trailer and truck tires to 80psi. The screw on the chuck is also well made and works very well. You no longer need three hands: one to steady those rubber valve stems, one to hold the tire clamp, and a third to operate the lever on the air tank hose. Both work well even when the portable air tank is filled to 120psi with an air compressor. Simply connect a cartridge to the portable tank, set the compressor to 125psi, turn it on and go while the tank fills up. No more kneeling at the tank to hold a round while the tank fills