Bosch Professional Extension 1/4" hex Quick Change 305 mm

Bosch 2608587521 1/4-Inch Quick Change Hex Shank Extension for Self Cut Speed Spade Bits

Bosch 13x EXPERT Self Cut Speed Spade Drill Bit Set (for Softwood, Particleboard, Ø 10-32 mm, Professional Accessory Rotary Drill/Drivers)