Skeletal bone was frequently used for soft-hammer percussion and pressure-flaking tools.  Bone indentors were mostly used for relatively light percussion retouching although some bones were used for heavier percussion.  Bone pressure flaking tools were used from early in prehistory right through to the recent past.  Skeletal bone is more brittle and prone to breakage than antlers, but unlike antler, bone is readily available in all parts of the world.  Bone was widely used as handles for stone tools.