Irwin Speedbor 8-Piece Spade Bit Set Brand_Vacmaster Fits all standard quick change

Fits all standard quick change chucks and adapters

bit diameter 11/64"

designed for hand threading work in a variety of materials taps produce a class 2b thread

pilot bit & 2 adapter nuts 1/2" & 5/8"

Patent Pending welded cutting edge for increased durability

Irwin Speedbor 8-Piece Spade Bit Set Brand_Vacmaster Fits all standard quick changeBlue 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. Includes Pro Set case made of molded ABS resin with full length metal hinge pin. Bit identification is simple with easy to read size markings. 6' shank length, 1 4' shank size. Set includes: 3 8', 1 2', 5 8', 3 4', 7