The DeWalt DT70729 23 piece Black and Gold Drill bit set in a tough case. Dewalt Black & Gold HSS Drill Bits have a speed tip and a tough core for increased durability. The bits also incorporate a no-spin shank that eliminates the frustration of the bit spinning in the chuck. The new flute geometry gives outstanding durability and bit life. The precision speed tip has an optimised design for faster material penetration and increased drilling speed. Supplied in a Tough case, this is part of a connectable case system that is TSTAK compatible. Individual tough case can be clipped together for easy transportation. Features and Benefits • Optimized propeller angle • New flute geometry for faster drilling and longer service life. • No empty rotation thanks to 3 flat dishes to lock the holding of the drill (from 4.8mm). • Box compatible with the Dewalt Tough Case range. • 135 ° head angle Contents • 1mm x2, 1.5mm x2, 2mm x2, 2.5mm x2, 3mm x2, 3.5mm x2, 4mm x2, 4.5mm, 4mm x2, 5mm x2, 6mm, 8m