Make inside neck sizing smoother and easier without lubrication. Now you can upgrade your die sets with a carbide size button kit. Available for bottleneck cartridges 20 thru 338 cal. The carbide size button is free floating on the decap rod allowing it to selfcenter in the case neck. Kits contain: carbide size button, retainer and spare decapping pin. These kits also fit all Type-S dies.