Milwaukee
Milwaukee Tool SHOCKWAVE Impact Duty Metric Step Bit 4–30 mm
- SKU:
- MLW48-89-9265
- Availability:
- Usually Ships Same Day
- Weight:
- 0.33 LBS
Description

DUTY®
4–30 mm
Metric Step Bit
Drill stepped metric holes from 4–30 mm with a 1/4 in hex bit for impact drivers and drill/drivers.
Product Overview
Use this 4–30 mm metric step bit to make several hole sizes without changing the installed bit.
Dual spiral flutes clear chips; TiAlN coating and the SHOCKZONE shank support cutting durability.
- Rapid Strike tipFast, accurate hole starts.
- Dual spiral flutesCarry chips away from the cut.
- TiAlN coatingCutting-edge wear resistance.
- SHOCKZONE shankHelps limit shank breaks.
Technical Specifications
- Hole range
- 4–30 mm
- Shank
- 1/4 in hex
- Coating
- TiAlN
- Tip
- Rapid Strike
- Flutes
- Dual spiral
- Tool use
- Impact driver / drill
Choose the Correct Fit
Locate the required diameter on the bit before drilling. Check that the depth of that step suits the material thickness.
Secure the work so it cannot spin. Use a suitable speed and lubricant for the material, following the tool’s instructions.
Installation & Care
Seat the 1/4 in hex shank securely in a compatible tool. Keep the bit square and stop before the next step enlarges the hole.
Stop the tool before clearing chips. Let the bit cool, then check the cutting edges and shank before putting it away.
Small Details. Big Jobsite Energy.
Get set. Stay focused. Make your next move count.
THE NEXT JOB.
Ask Willy:
Need help selecting a step bit? Tell Willy the required metric hole size, material, thickness and tool.
Important Product Questions
Can I use it in an impact driver?
Yes. This SHOCKWAVE bit is optimized for impact drivers and can also be used in drill/drivers. It has a 1/4 in hex shank.
Does it cut every size between 4 and 30 mm?
Use only the marked steps on the bit. The range describes its endpoints; it does not provide a continuous diameter adjustment.
How thick can the workpiece be?
Check the depth of the selected step against the material thickness. If the work is thicker than that step, the next diameter can enter before a straight hole is completed.