Product Description ------------------- Rfbs are clean, oil-free, pre-cut threaded rod, supplied with nut and washer. Offers a complete engineered anchoring system when used with Simpson strong-tie adhesive. Inspection is easy; the head is stamped with rod length and "no equal" symbol for identification after installation. From the Manufacturer --------------------- Retrofit Bolts are pre-cut threaded rod, supplied with nut and washer. For use with Simpson Strong-Tie adhesives. Use with Simpson Strong-Tie adhesives to anchor into existing concrete and masonry. Offers a complete engineered anchoring system when used with Simpson Strong-Tie anchoring adhesives. Each end of the threaded rod is stamped with rod length in inches and our "No-Equal" symbol for easy identification after installation.