These boring bits are designed for accurate boring and the two wing cutters and two spur cutters prevent bottom side tear out. Boring bits are supplied with a 3/8" shank with an adjustable top screw making them compatible with most boring machines. The 3557E is designed with a 3/8" shaft to fit in most drill presses.
Ideal For: Freud's Industrial Carbide Tipped Cylinder (Hinge) Boring Bits are designed for multiple spindle machines.
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