Drill Type	Bit Diameter		Buttons,mm			Thread	Water Hole	Part No.
	mm	in	Guage	Front	Angle
Button Bits Flat Face  Standard	38	1 1/2"	4×8	2×8	30°	25R	3	Q638-25R
	41	1 39/64"	4×8	2×8	30°	25R	3	Q641-25R
	42	1 21/32"	4×8	2×8	30°	25R	3	Q642-25R
	45	1 49/64"	4×8	2×8	30°	25R	3	Q645-25R
	48	1 57/64"	4×8	2×8	30°	25R	3	Q648-25R
	51	2"	4×8	2×8	30°	25R	3	Q651-25R
	38	1 1/2"	4×8	2×8	30°	28R	3	Q638-28R
	41	1 39/64"	4×8	2×8	30°	28R	3	Q641-28R
	42	1 21/32"	4×8	2×8	30°	28R	3	Q642-28R
	45	1 49/64"	4×8	2×8	30°	28R	3	Q645-28R
	48	1 57/64"	4×8	2×8	30°	28R	3	Q648-28R
	51	2"	4×8	2×8	30°	28R	3	Q651-28R
	38	1 1/2"	4×8	2×8	30°	32R	3	Q638-32R
	41	1 39/64"	4×8	2×8	30°	32R	3	Q641-32R
	42	1 21/32"	4×8	2×8	30°	32R	3	Q642-32R
	45	1 49/64"	4×8	2×8	30°	32R	3	Q645-32R
	48	1 57/64"	4×8	2×8	30°	32R	3	Q648-32R
	51	2"	4×8	2×8	30°	32R	3	Q651-32R
Button Bits Flat Face  Standard	38	1 1/2"	5×8	2×8	30°	25R	3	Q738-25R
	41	1 39/64"	5×8	2×8	30°	25R	3	Q741-25R
	42	1 21/32"	5×8	2×8	30°	25R	3	Q742-25R
	45	1 49/64"	5×8	2×8	30°	25R	3	Q745-25R
	48	1 57/64"	5×8	2×8	30°	25R	3	Q748-25R
	51	2"	5×10	2×8	30°	25R	3	Q751-25R
	38	1 1/2"	5×8	2×8	30°	28R	3	Q738-28R
	41	1 39/64"	5×10	2×8	25°	28R	3	Q741-28R
	42	1 21/32"	5×8	2×8	30°	28R	3	Q742-28R
	45	1 49/64"	5×8	2×8	30°	28R	3	Q745-28R
	48	1 57/64"	5×8	2×8	30°	28R	3	Q748-28R
	51	2"	5×8	2×8	30°	28R	3	Q751-28R
Button Bits   Flat Face   Standard	38	1 1/2"	5×8	2×8	30°	32R	3	Q738-32R
	41	1 39/64"	5×8	2×8	30°	32R	3	Q741-32R
	42	1 21/32"	5×8	2×8	30°	32R	3	Q742-32R
	45	1 49/64"	5×8	2×8	30°	32R	3	Q745-32R
	48	1 57/64"	5×10	2×9	30°	32R	3	Q748-32R
	51	2"	5×8	2×8	30°	32R	3	Q751-32R