Milwaukee 48899265 Shockwave Metric 4-30mm 12 Hole Step Drill Bit


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The Milwaukee SHOCKWAVE Impact Duty Step Drill Bits are engineered to deliver a durable and fast impact step bit hole drilling solution. The Milwaukee step drill bits are made in the USA with global materials and give you best-in-class performance in impact drivers with the versatility to be used in drills. The 1⁄4” hex shank has an optimised SHOCKZONE body providing you with a more durable shank, reducing early shank breaks. A Titanium Aluminum Nitride (TiAlN) coating helps reduce heat build-up and deliver up to 5x longer life compared to a standard step drill bit. Additionally, Milwaukee’s step drill bits Rapid Strike tip and dual spiral flute produce 2x faster holes compared to a standard step drill bit.


  • Optimised SHOCKZONE absorbs peak torque to reduce breaking the shank
  • 1⁄4” Hex shank is more versatile because it can be used in impact drivers and drills
  • More advanced than black oxide coating, TiAlN is better at reducing heat transfer to the drill bit, particularly important when drilling metals. Reducing heat transfer will reduce the wear and therefore give longer life
  • 5 Times longer life with Titanium Aluminum Nitride (TiAIN) coating
  • Dual spiral flute optimised spiral design to suit impact drivers’ faster rotating speeds
  • Rapid strike tip creates fast, accurate starting holes to improve overall performance
  • Easy stop identification with laser etching numbers
  • Made in the USA


  • Shank: 1/4″ Hex
  • Sizes: 4mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm
  • Dimensions (L x W x H): 160mm x 75mm x 30mm
  • Weight: 0.115kg