LARGE SERIES COLLET DIE ONLY Note: If you are using a competitor's press with removable bushing, consider our 1 1/2-12 to 1 1/4-12 die adapter bushing. This bushing will allow you to install these dies into your press. Lee Collet Die only that uses a Collet to squeeze a Mandrel, creating a precisely aligned case neck while reducing run out. Sizes just the neck and requires no lubrication. Mfg: Lee Precision