Bit-Check 10 Impaktor4. Impaktor technology provides extra long life even in extreme conditions. Increased frictional resistance thanks to the coarse diamond particle coating on the bit tip prevents the tool from slipping out of the screw. Impaktor holder to soften extreme impacts. Excellent torsional effect thanks to the double torsion spring. Particularly suitable for use with conventional impact screwdrivers. The multi-component material of the Bit-Check features a low weight and compact design. The soft material in the lower section of the Bit-Check ensures good bit attachment, while still being easy to remove. The “Take it easy” tool finder with colour coding and easy to read markings make it easy to identify the bit profile and size.