19/64 x 18 in high-speed steel extra long drill bit vs BOSCH 1-Piece Extra Long Drill Bit 5/16 in x 12 in (Pack of 3)
Overall winner: BOSCH 1-Piece Extra Long Drill Bit 5/16 in x 12 in (Pack of 3)
Key Differences
Bosch (A) is a 5/16 x 12 in extra-length set marketed for faster drilling with a speed helix and claims about lasting 50% longer than HSS; reviewers note mixed durability but praise length and versatility. Drill America (B) is a 19/64 x 18 in HSS extra-long bit with black oxide coating for lubricity and general-purpose use, but has more reports of breaking or dullness and a slightly lower average rating
19/64 x 18 in high-speed steel extra long drill bit
High-speed steel drill bit with extra length for reach. Features black oxide for lubricity and coolant pockets near the edge; round shank for versatile toolholding. Customers note long flute length but mixed durability and sharpness
Pros
- high-speed steel construction
- black oxide coating for lubricity
- extra-long reach for deep drilling
- round shank for versatile toolholding
Cons
- mixed durability reports
- some users find it dull or prone to breaking
- mixed drilling accuracy feedback
BOSCH 1-Piece Extra Long Drill Bit 5/16 in x 12 in (Pack of 3)
Aircraft black oxide drill bit with speed helix for faster drilling in light-gauge metal, wood, and plastic. Per-pack info; longer life and reduced heat. One customer notes good quality and length enough to drill through walls
Pros
- speed helix design for faster drilling
- lasts longer than high-speed steel
- easier drilling with reduced heat
- per-pack information provided
Cons
- mixed durability feedback from customers
- some reports of breakage during first use
Head-to-Head
| Criteria | Winner |
|---|---|
| Price | Drill America |
| Durability | BOSCH |
| Versatility | BOSCH |
| User Reviews | BOSCH |