It can be used in crushing the rock which ground are formed by earth,gravel,rock evenly.

Section	Bit Size (mm)	Weight (kg)	Applied Hammer	Applied Hammer outer size(mm)
small diameter	4 1/8" (105)	8	4" Hammer	98
	4 1/2" (114)	9
	4 7/8" (124)	10
	5" (127)	12
	5" (127)	16	5" Hammer	116
	5 3/4" (146)	18
	6" (152)	25	6" Hammer	138
	6 1/2" (165)	30
	6" (152)	48	8" Hammer	180
	7 7/8" (200)	50
	8"	52
	10"	65
	10"	105	10" Hammer	225
big diameter	12" (302)	120
	12" (302)	170	112 Hammer	272
	15" (381)	230
	15" (381)	300	330 Hammer	330
	17 1/2" (445)	340
	17 1/2" (445)	360	350 Hammer	350
	20" (508)	500
	20" (508)	565	450 Hammer	410
	21" (533)	590
	22" (559)	620
	24" (610)	730
	24" (610)	985	550 Hammer	520
	26" (660)	1060
	28" (711)	1120
	30" (762)	1200
	33" (838)	1500
	33" (838)	2275	750 Hammer	720