Combined Bolt = Combined Bolt Luoyang River Thai Technology Co., Ltd - a professional manufacturer of hollow bolt sincerely welcome your patronage, manufacturers supply, the price advantage is obvious, sincerely look forward to your call, guaranteed to give you the best service and price. Combined Bolt, modular bolt, screw anchors, hollow bolt modular modular hollow bolt by bolt hollow bolt body, solid steel, connected sets, anchor head, only the pulp plug, plate and nut exhaust pipes and other components. Combined anchor application mainly for weak geological condition - good rock permanent support, demagnetization support and other temporary support. One product is currently due to low construction cost, economical, through a combination of construction, to enhance the effect of supporting, is a new type of hollow bolt grouting. Combined Bolt General Specifications 22 / 25mm