Lee uses a solid carbide insert, ground to a special contour that does not leave the belt mark on the case. With a carbide sizer, no case lube is needed. Stock photo shown. This used example does not have the data sheet.
Lee Carbide Pistol dies include full length sizer, bullet seater and roll crimper, factory crimp die, built in stuck case remover, long guided expander, shell holder, powder dipper.