... tunneling, steel, forestry, the natural stone industries or road building.Mining bits coal cutter pickPhysical Description: Steel Body, made ... , steel, forestry, the natural stone industries or road building. Place of originZhejiang.ChinaApplicationDrilling,Trenching,Mining and Tunnelling,RecyclingCertificationISO9001:2008MaterialASTM ... weeks tungsten carbide coal pick bits/cutter bits/blocks/holders