element 19 is slid onto clamping sleeve 17 the washer compresses the clamping sleeve 17 to such an extent that its external diameter is equal to or smaller than the diameter of bore 21 in bit holder 20 longitudinal slot 18 is wide enough so that clamping sleeve 17 can be pressed together far enough that its internal wall lies on bit shank 14 since bore 21 of bit holder 20 is provided with diverging frustoconical opening 22 the bit shank 14 of cutter bit 10 can be easily inserted into bore 21 this insertion process can be carried out manually until holding element 19 strikes the frontal side of the bit holder 20 then with increased application of force for example by means of a blow from a hammer the cutter bit 10 can be driven far enough into bore 21 so that collar 12 of bit head 11 by means of the holding element 19 is driven to face against the frontal side of bit holder 20 as illustrated in fig2 second embodiment in this manner holding element 19 formed as a holding washer is moved from clamping sleeve 17 down onto the free area 13 of the bit shank 14 between clamping sleeve 17 and the bit head 11 so that it releases clamping sleeve 17 clamping sleeve 17 can now be tensed with the tensing force specific to it in the bore 21 of bit holder 20 since it would accommodate in the.