These Plasplugs Thermal Block Fixings offer a fast and efficient solution for securing light to heavy items in thermal block walls. Specially designed for aerated concrete and similar building materials, these fixings simplify installation with their innovative self-drive technology. Ideal for use in Thermalite® and Celcon® blocks, this pack includes everything you need for a quick and secure installation process. The fixings cut their own thread in the thermal block to give a superior grip within the crumbly material. They are recommended for use in lightweight block, aircrete blockwork, aerated blocks, Thermalite and Celcon. The pack contains an 8mm drill bit and driver. Recommended Screw Size: No.10.