sufficient heft to allow the removal of the worn out bit holder 20 from a bit block such as 101 in fig1 is the added mass and heft of the upper body portion 20 as first described in the specification of copending application ser no 12 844 988 the annular bottom 28 a of the upper body portion is about 0 5 inch in diameter greater than the outline of the bit block 101 on which it is mounted lending added mass to that part of the bit holder referring now to fig6 and 7 a second preferred embodiment of the present invention generally indicated at 50 like the first embodiment 20 includes a generally frustoconical upper body portion 51 and a lower generally cylindrical shank portion 52 in this second embodiment the shank portion 52 is identical to the shank portion 22 of the first embodiment although it may have other configurations as shown in my prior patents noted above also similarly to the first embodiment a central axial bore 53 extends through both the upper body portion and the lower shank portion through the bit holder also in this embodiment the upper bit mounting portion 54 and the tire portion 55 are substantially identical to.