Technical dataDiameter 15, 20, 25, 30, 35 mm Set with five high-quality Forstner drill bits with replaceable centring points, as well as a 4 mm centring bit for different drilling applications. The drill bits can be directly inserted into the CENTROTEC tool chuck and locked. The high-quality drill bits are cleanly stowed, Mini-Systainer SYS3 S 76.