Hole Opener

Hole opener conventional size series:300 mm、 400mm 、 500mm 、 600mm 、 700 mm、 800mm 、 900mm 、1000 mm、 1100mm 、 1200mm 、 1300mm 、 1400mm 、 1500mm 。（Note :300mm to 1500mm diameter in the context of under-users need to provide various forms of cross bits）. Main parameters: ProductType(mm)Type(inch)CutterHole openerCY150-216YLCY6-8 1/2YLCone bitHole openerCY150-241YLCY6-9 1/2YLCone bitHole openerCY216-311YLCY81/2-12 1/4YLCone bitHole openerCY241-311YLCY9 1/2-12 1/4YLCone bitHole openerCY216-350YLCY8 1/2-14YLCone bitHole openerCY241-350YLCY9 1/2-14YLCone bitHole openerCY241-400YLCY9 1/2-16YLCone bitHole openerCY311-400YLCY12 1/4-16YLCone bitHole openerCY311-450YLCY12 1/4-18YLCone bitHole openerCY400-450YLCY16-18YLCone bitHole openerCY450-500YLCY18-20YLCone bitHole openerCY500-550YLCY20-22YLCone bitHole openerCY550-600YLCY22-24YLCone bitHole openerCY600-650YLCY24-26YLCone bitHole openerCY650-700YLCY26-28YLCone bitHole openerCY700-750YLCY28-30YLCone bitHole openerCY750-800YLCY30-32YLCone bitHole openerCY800-850YLCY32-34YLCone bitHole openerCY850-900YLCY34-36YLCone bitHole openerCY900-950YLCY36-38YLCone bitHole openerCY950-1000YLCY38-40YLCone bitHole openerCY1000-1050YLCY40-42YLCone bitHole openerCY1050-1100YLCY42-44YLCone bitHole openerCY1100-1150YLCY44-46YLCone bitHole openerCY1150-1200YLCY46-48YLCone bitHole openerCY1200-1250YLCY48-50YLCone bitHole openerCY1250-1300YLCY50-52YLCone bitHole openerCY1300-1350YLCY52-54YLCone bit