Irwin Speedbor 6-Piece Spade Bit Set Sanding self tapping screws are specially

self tapping screws are specially designed for pocket hole joinery

60/40 alloy made of 60% tin and 40% lead

Trusted for more than 50 years

Great for bundles of wire

Wheel size 4" Arbor and bushing ID's 5/8 - 11

Irwin Speedbor 6-Piece Spade Bit Set Sanding self tapping screws are speciallyBlue Groove point and cutting edge for faster chip removal. Double cutting spurs scribe the outside of the hole reducing breakout. 10% larger shank for added durability. Grooved hex shank prevents slipping in drill chuck or bit extension. Bit identification is simple with easy to read size markings. Standard length. Includes sizes: 3 8', 1 2', 5 8', 3 4', 7 8', and 1'.