Bosch T101B vs T118A: Wood or Metal Jigsaw Blade?
By The DIYPicks Team · Updated July 2026
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Bosch T101B 4 in. 10 TPI Clean-Cut Wood T-Shank Jigsaw Blades (5-Pack)
The default do-everything wood jigsaw blade when a clean edge matters more than raw speed.
| TPI | 10 variable pitch |
|---|---|
| Length | 4 in |
| Material | High-carbon steel (HCS) |
| Shank | T-shank |
| Best cut | Clean wood / plywood |
Bosch T118A 3-5/8 in. 17-24 TPI Basic-for-Metal T-Shank Jigsaw Blades (5-Pack)
A fine-tooth metal jigsaw blade sized for sheet and thin stock, not thick plate.
| TPI | 17-24 variable |
|---|---|
| Length | 3-5/8 in |
| Material | High-speed steel (HSS) |
| Shank | T-shank |
| Best cut | Sheet metal under 1/8 in |
Our verdict
The choice is entirely about material. The T101B is a 10 TPI high-carbon-steel blade that leaves a clean, splinter-free edge in wood, plywood and laminate but cannot touch metal. The T118A is a fine 17-24 TPI HSS blade that keeps multiple teeth on thin sheet metal so it will not snag, but it clogs and crawls in wood. Both share the universal T-shank, so keep both in the case and match the blade to the workpiece rather than trying to make one do both.