Ammco Style Positive rake cutting bits for Disc/Drum Lathes. Replaces all Ammco 907681-10 bits. 3 Cutting Edges Ammco Models 3850, 4000, 7000 and 7500 as well as Twin Cutter & 9381 Facing Set. FMC, John Bean, Barrett, Snap-On-the-Car Lathes Model 500 RTI Style Lathes using Positive rake cutting edges. OEM# 7681-10. 3 Cutting Edges. Hunter Disc/Drum Lathes Model OCL400, OCL360, BL505 and BL501. Replaces Hunter OEM# 221-640-3. RTI Bench lathe Models BTC500, BRC550 and BRC35 On-the-Car lathes. Replaces RTI OEM# 080-80102-00. 3 Cutting Edges for use on OEM# 907681-610 for Ammco. OEM# 7681-10 for FMC, John Bean, Barrett, Snap-On-the-Car Lathes. OEM# 221-640-3 Hunter. Use Shark Toolholder 968 and 969. Works with Hunter Tool holder #25-499-2 and 57-500-2. For use with RTI Tooholder #450-80001-00 or 450-8002s-00.