FBN II offers maximum load-bearing capacity in non-cracked concrete. Reduced anchorage depth reduces drill time - this saves time and reduces reinforcement hits during drilling. Long thread allows stand-off installations and variable usable lengths. Diameter 8 to 20 mm also for reduced anchorage depths, e.g. for small loads or if reinforcement is hit. Embossed letter on the head for subsequent control of the installation as it indicates the setting depth.