8PCS Set of Auger Drill Bits with 12" (300mm) Auger Drill Bit Extension
4 Cutter Auger Bit with Screw Tip
Cleaner & Faster Cutting
Sizes: 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 25mm
Length of the extension rod: 300mm
Total length with extension: 465mm
The extension is with Double set screw with Allen wrench. Recommended for all 1/4" hex shank drill bits.