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Wedge Anchor shall be a threaded stud with an integral cone expander & a single piece expansion clip. The anchor shall meet National Test Standard:GB288. -How to Install a Concrete Wedge Anchor When you apply torque to a nut threaded onto the draw bolt, the bolt's tapered end expands the sleeve. The expanded sleeve locks the draw bolt into the concrete. The concrete hole that holds the wedge anchor can not contain any dust or debris; if the wedge anchor lodges into debris, it will not fully lock into the concrete. This results in the anchor working free in time and releasing from the concrete hole. -Technical Requirement: 1. Clip properly stamped & fixed 2. Threading tolerance: As per GB/197 8g 3. Mechnical property test: no crack allowed or break -Packing: White Inner Box or Color Inner box then In Carton Box Into Wood Pallet