https://www.acehardware.com/departments/tools/power-tool-accessories/drill-bits/2305019
Irwin Speedbor 1 in. X 4 in. L Carbon Steel Wood Boring Bit Quick-Change Hex Shank 1 pc Mfr# 87916...
IRWIN Blue-Groove point and cutting edge for faster chip removal - 4x faster than standard spade bitsFind the DRILL BIT 1SPDBOR FLAT at Ace.