Bits fit 3/8" square toolholders found on Ammco and most other brake lathes.
Positive Rake Round Carbide Bit Holders w/ 10pk of Bits for Brake Lathe Ammco
Hunter Positive Rake Round Insert Tool Holders W/Bits & Torx. OCL400 Brake Lathe
Ammco Round Carbide Brake Lathe Bits 10-PK Positive Rake Style 940610
Ammco 40610 Round Positive Rake Carbide Insert 10 Pk
Ammco Brake Lathe Round Tool Holder Set R&L 940630 Positive Rake Bits 940610
Ammco Brake Lathe Round Tool Holder Set 940630 & Positive Rake Bits 10pc 940610