用于小石头、沙土、岩石等布局均衡的地质，会破碎岩石。

分类	钻头大小 (mm)	重量 (kg)	适用潜孔锤	适用潜孔锤外径(mm)
小口径	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
大口径	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