For Kwik Way Models SDL,DL,850 Disc Lathe,NDL,BDL,CBL----- Kwi-Lathe On-The-Car #108-0005-04 ROTUNDA,LINE-O-TRONICS---- Kwik-Way part# 109-1092-23---- Rels Model SW504 Swing Arm -Rels Part # SW4236-15---- For Snap-On Models YA180,YA281 -Snap-On Part # BTK10A---- 3 cut edges ---- positive rake for rotor & drum 6 bits per pack.