HSS Step Drill Set 3 Piece

• 3 Step Drill Bits: 4-12mm (9 steps), 4-20mm (9 steps) and 4-30mm (14 steps)
• Step Drill 4-12mm (4,5,6,7,8,9,10,11,12mm) 
• Step Drill 4-20mm (4,6,8,10,12,14,16,18,20mm) 
• Step Drill 4-30mm (4,6,8,10,12,14,16,18,20,22,24,26,28,30mm) 
• Titanium Nitride High-grade High Speed Steel
• Precision ground multi-flute cutting edges for burr-free holes
• Self-centring point eliminates the need to pre-punch
• Cylindrical shank for use in 3-Jaw drill chuck rotary drills (do not use on hammer action)
• Supplied in a metal storage box.

High Quality HSS step drills for professional use. Precision ground, multi-flute cutting edges produces accurate burr-free holes. Also features a self-centring point which eliminates the need to pre-punch. Titanium Nitride (TiN) coated for extra wear resistance. Used to create accurate holes or enlarge holes in metals up to 10mm thick.

Application: Steel, non-ferrous metals and hard plastics up to 10mm thick