Brunner & Lay Steel Rock Bit, H Thread, 2" Diameter - LH50SH
Brunner & Lay Steel Rock Bit, H Thread, 2-1/2" Diameter - LH63SH
Brunner & Lay Steel Rock Bit, H Thread, 2-1/4" Diameter - LH57SH
Brunner & Lay Steel Rock Bit, H Thread, 2-5/8" Diameter - LH66SH