Lee Spline Drive Breech Lock Bushing 4 Pack. New easy grip splined drive surface allows easy accurate and fast die installation in your press. Reloading dies are confusingly similar looking so we anodized and colored the bushings so you can ?color code? your dies for quick positive identification. No need for lock rings on your dies with these quick-change bushings. Simply lightly tighten the clamp screw and split collar will put a vice lock on your die. Loosen the screw and the die will spin freely. Once set you?ll never lose position.They look so good and work so well you?ll want them for all your diesFor even easier installation we have a handy lock ring wrench. Works with Lee Spline drive lock rings and Breech lock bushings Specifications for Lee Spline Drive Breech Lock Bushing: Manufacturer: Lee Quantity: 4 Length: 5.05 in Color: Multi Dimensions: 1.35 X 3.70 X 5.05 in Package Contents: Lee Spline Drive Breech Lock Bushing Lee 90095: Spline Drive Breech Lock Bushing 4 Pack