The horseshoe chisel bits are maninly used in coal mining, metal mining, and stoning,use the best material 42CrMo steel. Product Name:Horseshoe Chisel BitsSimple :1) Tapered connection: 4, 6, 7,11,12 2) Alloy steel:42CrMo 3) Suitable carbide tips:YK20 4) Chisel bit diameter: 20-60mm 5)Technology:weldingThe horseshoe chisel bits are maninly used in coal mining, metal mining, and stoning,use the ...