CELO BTS concrete screws with version 1 are suitable for various severe operating conditions, as they can be used in cracked and non-cracked concrete. Fire safety class R 120 provides greater safety in the event of fire. BTS can also be used in seismic applications (C1). Thanks to the three installation depths and adjustment options, the screw positions can be changed. Special thread geometry and hardness ensure safe installation in concrete. Zinc flake coating improves corrosion resistance and application reliability. The BTS is an anchorage without expansion, which allows you to reduce edge distances and gaps. Zinc flake coating improves corrosion resistance and application reliability. Thanks to the built-in washer, no additional washer is required. You save time and money.