12Pcs SPEED Fast Cut Spade Bits Auger Wood Drill Bits Holesaw Joiner Carpenter Self-feed Boring 10mm to 35mm

The fastest boring bits ever!
These are sharp and sturdy bits designed to bore into softwoods quickly. The design is an improvement over spade and auger bits.

According to our test，these upgrade drill bit：
10 times faster than standard spade for boring hole！
4 times faster than standard auger drill bits for removing chip！

Aggressive Bits
These are aggressive bits that are designed for drilling through softwoods like pine, cedar, fir, or spruce, the type of woods typically used in residential framing. These drill bits could be quickly pulled into the wood without having to apply much pressure.

Screw Tip Self-feed & Self-centering Design
The precision cut lead screw pulls the bit straight and true through material.

4 Flutes Design
Designed for 4 precision ground cutting edges and 4 flutes engineered to optimize performance, smooth starts, fast cuts and smooth holes and easy for chip removing

Specification:
Material:Fully Heat Treated High Carbon Steel

Shank:1/4"(6mm) Hex Shank

Number of Flutes:4

Tip Type: Self-Feeding & Self-centering Screw Tip

Recommended Speeds:

Size 10-20mm=RPM 1500-200

Size 22-25mm=RPM 1000-1500

Size 28-35mm=RPM <1300

SET:

8Pcs 10mm-25mm=10mm,12mm,14mm,16mm,18mm,20mm,22mm,25mm

12Pcs 10mm-35mm=10mm,12mm,14mm,16mm,18mm,20mm,22mm,25mm,28mm,30mm,32mm,35mm

Size Chart:

Note:
1.DO NOT attempt to dig with this drill bit going at full speed. Unlike a spade bit where the faster the blade is going the smoother it'll get started, you should try to start relatively slow with this.
2.For charging electric drill, it should be more than 48V, and if use hand electric drill, it should be more than 500W, or it will drill might be stuck.