Set containing high-performance metal drill bits with high-grade titanium nitride coating, for a particularly long service life and fast drilling progress. Bit diameters in 0.5 mm steps from 1.5-6.5 mm. Metal drill bits with titanium-nitride coating The high-grade metal drill bits with titanium-nitride coating excel through their long lifetime and high strength For fast, clean drilling in the most diverse metals, plexiglass and hard plastics (not suitable for use with aluminium) Up to 40% faster drilling rate than with comparable drill bits without titanium-nitride coating Up to 6 times longer lifetime when used with proper cooling Low risk of breakage thanks to excellent elasticity Rugged metal cassette for a clear and logical storage layout and bit protection Note: Use of coolant recommended, eg Bosch universal cutting oil 2 607 001 409