Milwaukee 1-1/4 in. x 6 in. Speed Feed Wood Bit (model 48-13-0108).Product DetailsType: Self-feeding wood auger bitSize: 1-1/4 inch (32 mm) diameterShank size: 1/4 inchSpeed: Up to 10 times faster than flat boring bitsFeatures: Coated flutes for fast chip removal and double wing spurs for clean holes