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91170 Stepped Drill 4 - 30mm

Multi diameter HSS step drill, provides the ability to increase the sizing of drilled or punched alignment holes accurately without changing tools. A rapid drilling tool ideal for mechanics, panelbeaters or fabricators.

Drill diameters from 4 - 30mm in 2mm increments, without the need to change tools.
Spiral flute provides two cutting edges for faster drilling and includes edge breaker & self starter.
Step drill has a deburring zone which can deburr the cutting edge.
10mm shank.
HSS Titanium-nitride coated to increase tool life.