Diablo DSDS003 is a 3-piece impact step drill bit set.
Step drill bits drill and enlarge round holes in sheet metal, electrical boxes, panels and ductwork in a single bit, stepping up size by size. A set covers several ranges so one kit handles knockouts, conduit holes and fastener holes. The bits are rated for use in impact drivers as well as drills.
Use cutting oil on steel, run at moderate speed, and stop at the step that matches the hole size you need.
Specifications
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Brand: Diablo
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Manufacturer Part #: DSDS003
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Type: Impact step drill bit set
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Pieces: 3
See also: Step Drill Bits, Cutting Oil, Bit Sets, Diablo.