Wiha’s objective with the CentroFix was to create the most accurate, rigid and concentric bit holder in the world. The patented method for gripping onto the hex shanks uses a 4-ball retention system. This gives unrivalled accuracy and concentricity. It really scores when you’re using hex-shank drill bits; there is zero play, ensuring concentricity. CentroFix is rock solid even with long screwdriver and drill bits. The tight grip is remarkable and it will hold just about any bit, including plain, waisted and double-ended hex bits. The CentroFix is in a class of its own for those who want rigidity.