Milwaukee 48-25-5125 — SWITCHBLADE™ Selfeed Bit (1-1/2")
The Milwaukee 48-25-5125 SWITCHBLADE™ Selfeed Bit is a wood boring drill bit designed for fast, repetitive hole cutting, typically used in framing, rough-in electrical, and plumbing work where large diameter holes are needed.
Unlike standard auger bits, this is a self-feeding bit, meaning it pulls itself through the wood using an aggressive feed screw, reducing the amount of pressure you need to apply.
Key Features
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1-1/2" cutting diameter for large utility holes
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SwitchBlade™ replaceable cutting system (you replace blades instead of sharpening the whole bit)
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Aggressive self-feed screw pulls the bit through wood faster
- Designed for repetitive drilling in wood framing materials
- Hardened steel blade system for longer life and durability
- Hex shank (commonly 7/16") for secure drill/impact compatibility
What it’s used for
- Drilling large holes for plumbing pipes
- Running electrical conduit or wiring bundles
- HVAC and mechanical rough-ins
- General framing work requiring fast, repeatable boring
Why trades use it
The main advantage is speed and efficiency:
- Faster than standard spade bits or augers in heavy wood
- Replaceable blade system means less downtime vs resharpening
- Designed for production drilling, not precision work
