Bosch HB25M Master Bi-Metal Hole Saw Set (25-Piece) Review (2026)
By The DIYPicks Team · Updated July 2026
DIYPicks is reader-supported. As an Amazon Associate and affiliate of home-improvement retailers, we may earn a commission when you buy through links on our site — at no extra cost to you. This never affects our recommendations.
- Wood
- Metal
- Plastic
- Drywall
The Bosch HB25M is a 25-piece master bi-metal hole saw set covering 11 common sizes from 3/4 in to 3 in, with two quick-change mandrels, pilot bits and a molded case. The variable-pitch bi-metal teeth handle everyday wood, sheet metal, PVC and drywall for door hardware, conduit and plumbing, making it a strong-value general kit. It caps out at 3 in, so pair it with a large carbide saw for oversized or abrasive cuts.
Pros
- 11 saws from 3/4 in to 3 in plus two mandrels cover most household holes
- Bi-metal teeth cut wood, sheet metal, PVC and drywall
- Quick-change mandrels and a sturdy case keep sizes organized
Cons
- Tops out at 3 in - no large 4 in+ saws like the Milwaukee Big Hawg
- Bi-metal dulls faster than carbide in abrasive or nail-embedded material
- Mandrels use a hex-key set screw, slower to swap than fully tool-free arbors
Specifications
| Material | Bi-metal (HSS teeth on alloy body) |
|---|---|
| Sizes | 3/4 - 3 in (11 saws) |
| Shank | 2 quick-change mandrels + 2 pilot bits |
| Teeth | Variable-pitch bi-metal |
| Best for | Wood, sheet metal, PVC, drywall |