Product Description Professionals can now improve their productivity and accuracy with IRWIN��s innovative range. The 6x14mm Blue Groove 6X wood boring bits raise-thebar on tool quality and performance. The cutting edge technology incorporates true �cutting edges� that glide through the wood versus scraping its way through. The latest generation Blue Groove Power is adding extreme durability thanks to Bi-Metal Technology. Three cutting spurs for clean holes with minimal break out. Full screw tip for easy pull through and added accuracy. Tapered Tri-Flute design for faster chip ejection, less binding and ease of use. Full length heat treated for extra durability.