21-Piece HSS Twist Drill Bit Set with Black Oxide Coating, 135-Degree Tips and 31-Degree Helix
21-Piece HSS Twist Drill Bit Set with Black Oxide Coating, 135-Degree Tips and 31-Degree Helix
A 21-piece HSS twist drill bit set covers common general-purpose holes in metal, hardwood, softwood, PVC and fiberglass. DEWALT DWA1181 combines 135-degree split-point tips with a black oxide coating for controlled starts and corrosion resistance.
Parabolic flutes help eject chips in wood and metal, while the 31-degree helix reduces the over-aggressive feed associated with a true parabolic flute during deeper drilling. The assortment spans 1/16 through 1/2 inch and includes duplicates of frequently used 1/16, 5/64, 1/8, 3/16 and 1/4-inch sizes. Choose one 21-piece set or the five-pack option before ordering; the detailed bit count applies to each set. Match each diameter to the drill chuck, work material and recommended speed, clamp the workpiece and wear suitable eye protection. Clear chips with the tool stopped, allow heated bits to cool and keep the black oxide surfaces clean and dry in storage.
Specifications
- Brand: DEWALT
- Model: DWA1181
- Product: HSS twist drill bit set
- Bits per set: 21
- Pack option: 1 set
- Pack option: 5 sets
- Material: High-speed steel
- Coating: Black oxide
- Point style: Split point
- Point angle: 135 degrees
- Flute: Parabolic
- Helix angle: 31 degrees
- Shank field: Straight
- Smallest size: 1/16 in
- Largest size: 1/2 in
- Duplicate sizes: 1/16 5/64 1/8 3/16 and 1/4 in
- Surface: Metal
- Surface: Hardwood and softwood
- Surface: PVC
- Surface: Fiberglass
- GTIN: 00885911426749
- Power drill included: No
- Safety: Clamp work and wear eye protection
Frequently Asked Questions
Which materials can the DWA1181 bits drill?
The set is listed for compatible metal, hardwood, softwood, PVC and fiberglass.
What size range is included?
The 21-piece assortment ranges from 1/16 inch to 1/2 inch.
Which package quantities are available?
Choose one 21-piece set or a five-pack of 21-piece sets.
What does the 31-degree helix do?
It reduces aggressive feed while the parabolic flute helps move chips from deeper holes.