5/8" x 18" HSS Extra Long Drill Bit, DWDDL Series 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 with a speed helix design and claims of lasting 50% longer than HSS; it's higher rated and marketed for faster drilling and longer life. Drill America (B) is an 18" HSS extra-long bit with black oxide lubricity and a round shank for versatile toolholding, but has slightly lower rating and some reports of breakage and mixed accuracy
5/8" x 18" HSS Extra Long Drill Bit, DWDDL Series
High-speed steel drill bit with extra length for reach. Helps with general drilling, features black oxide for lubricity and chip evacuation near the edge. Customers note sharpness and quality, with mixed durability and accuracy feedback
Pros
- high-speed steel construction
- black oxide surface for lubricity
- extra long reach
- round shanks for versatile toolholding
Cons
- mixed durability reports
- some users experienced bending
- mixed 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 |