The Apolo MEA concrete screw BTS with Option 1 is suitable for a wide variety of heavy-duty applications due to the approval in cracked and non-cracked concrete. A fire resistance class R 120 for even more safety in case of fire. BTS can also be used in seismic action (C1). Because of the three setting depths and the adjusability the screw is very variable usable. A special thread geometry and hardness ensure reliable installation in concrete. Zinc flake coating for improved corrosion resistance and higher application security. BTS is an expansion-free anchor, this allows low edge distances and spacing. The zinc flake coating for improved corrosion resistance and higher application security. No additional washer required due the integral washer. You save time and money.