3Pc Small HSS Step Cone Drill Set Titanium Hole Cutter 3-12mm, 6-20mm & 4-12mm
1/4" quick change hex shank can be used in any drill or drill press. Four Stroke. High speed steel with titanium coating. Includes: 1x 10 step bit (3-12mm), 1x 8 step bit (6-20mm), 1 x 5 step bit (4-12mm).