Accu-Turn and Bosch Style Negative Rake Bits are 1/8′′ thick and for use on On-the-Car brake lathes. They have 6 cutting edges. They replace OEM# 878051 and work on On-The-Car brake lathe models 8700,8750 and 8800. On Ammco, they are for use on Models 1000, 1001, 3000, 4000, 4100, 7000, 7700 and On-the-Car models 700,705 and 710. They can also be used on the drum side of Model 3850 lathes. They replace OEM# 906914 bits. On RTI they are used on Model BRC35 On-the-Car Lathes. They replace OEM#080-80000-68 and fit tool holder 480-8001-00. OEM: 433796, Use On Models: 7700, 8920, 8922, 8944, 8989, 8990, 8991, 8993, 8995 and 8997 Brake Lathes. 3 Cutting Edges.