General purpose anchor bolt. Ferrule marked with hole for correct installation. Use in concrete, brickwork and stone. Rawlplug RBL2 Rawlbolt Anchor with Loose Bolt M12 x 140mm (5 Pack) in Silver. Rawlbolts are a heavy duty expanding fixing designed to hold heavy items securely in place. Offering both durability and reliability and are a perfect tool for anchoring structural beams, machinery, racking and other more substantial items The bolts are Ideal for use with brickwork, stonework and concrete.