Designed for aerated concrete and aerated concrete blocks. Removable, nylon construction, corrosion-proof and able to withstand extreme loads. 16mm external spiral thread cuts into a 12mm drilled hole and ensures a tension-free fastening ensuring no expanding and cracking. Simple and quick to install with a hex key. Compatible with 8mm metric and 5/16 inch imperial screws Suitable for Aerated Concrete Max. Load: 30kg Suitable for Hanging Radiators, Kitchen Cabinets & TV Mounting Nylon Construction Aggressive Coarse Thread improves Pull-Out Strength Suitable For All Types of Screws Suitable for Aerated Concrete Max. Load: 30kg Suitable for Hanging Radiators, Kitchen Cabinets & TV Mounting Nylon Construction Aggressive Coarse Thread improves Pull-Out Strength Suitable For All Types of Screws