Composed of threaded stud, chemical resin capsule and washer & hex nut. After drilling and cleaning the hole, insert the resin capsule and install the stud. The capsule breaks and releases adhesive, which cures to bond the stud firmly with base material. No expansion stress, suitable for cracked concrete, stone and masonry. Materials: carbon steel, 304 / 316 stainless steel. Mainly used for curtain wall, machinery foundation, guardrail and heavy-load installation.