Cactus Cutters Basic Seatbore System Cactus Cutters' adjustable Basic Seatbore System for a Bridgeport Knee-Mill includes: four different sized cutter bodies ranging in size from 1.250" to 2.250", a Micrometer Setting Instrument with a Scherr-Tumico micrometer head, two carbides for each cutter body, and a System Maintenance Kit. Additional sized cutter bodies, balldrivers, types of carbide and replacement parts are available.
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