Step Drill Bits

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Step Drill Bits

Subland twist drill.JPG
Synonyms: Unibits, Subland twist drill bits;
DE: Stufenbohrer
Type: drill bits
Material: plastic, metal, MDF
Used with: drills
Location: Wood Workshop (next to drilling table)
need a proper spot!
Access Requirements: read this page
Similar (More or Less): Blechschälbohrer

Step drill bits are especially nice for drilling through sheet metal as they make a smoother exit than regular twist drill bits.

As a little bonus, the holes usually come out slightly countersunk - not at the right angle to receive a sunk screw, but already deburred (entgratet).

drilling a rivet hole through two pipes
step drill bits can also be used to deburr holes