I ordered an Irwin Speedbor chisel with serrations on the blade edge to reduce pull out when drilling holes. These Chisels (P/N HAN88809) should also drill 4 times faster than the standard Irwin spade bit I was sent an Irwin spade bit #88809 which is a different bit and does not have corner spurs Also the bit I have drills received, pierced at half the rate of what I ordered. I opened the package before realizing the cutting spurs were missing, so I left the bit in. But nobody likes being lied to.