9/16" x 18" 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" extra-length set sold in a 3-pack with a speed helix design and claims of lasting 50% longer than HSS; it also lists a lower price tier and higher average user rating. Drill America (B) is a single 9/16" x 18" HSS bit with black oxide lubrication for general purpose drilling and a longer 18" reach, but has mixed durability reports including breakage claims
9/16" x 18" high speed steel extra long drill bit
High-speed steel drill bit with extra reach for general drilling. Combines hardness and toughness with black oxide finish to reduce friction and help coolant retention near the cutting edge. Customers note sharpness and quality, with mixed durability and accuracy insights
Pros
- high-speed steel construction
- black oxide finish for lubricity
- extra long reach for deep holes
- round shanks for versatile toolholding
Cons
- mixed durability reports (some say it breaks in half)
- mixed accuracy feedback across materials
- some concern about straightness
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 | BOSCH |
| Durability | Tie |
| Versatility | BOSCH |
| User Reviews | BOSCH |