Step Drill
These bits drill hole sizes from 1/8" to 1" in sheet metal without burring or deforming stock or threading the drill bit. They debur as they drill. Perfect for use as a "hole opening" reamer. They can also be used for making round holes from slots or intersecting holes.
Specifications
UB1 > Drills 13 holes sizes from 1/8 inch to 1/2 inch diameter in 1/32 inch
UB11 > Drills single hole size 7/8 inch diameter for creating 1/2 inch knock outs.
UB20 > Drills 8 holes sizes from 9/16 inch to 1 inch diameter in 1/16 inch increments
UB3 > Drills 9 hole sizes from 1/4 inch to 3/4 inch in 1/16 inch increments
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