Irwin Speedbor 8-Piece Spade Bit Set Brand_Vacmaster pilot bit & 2 adapter

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

Fits all standard quick change chucks and adapters

Ideal for rough or fine finishing

diameter: 5" arbor: 5/8"-11 wire size:

including high strength alloys

Irwin Speedbor 8-Piece Spade Bit Set Brand_Vacmaster pilot bit & 2 adapterBlue 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