These Aercrete Square Anchors are quick & easy to install, with no specialist tools required. The patented leg design gives them excellent pull-out tolerances, & they will take screw sizes 6-10 gauge. Manufactured from 100% reinforced nylon. APPLICATION: A stand alone fixing that can be hammered into an AAC block. Use with any standard screw types sizes 6 to 10 gauge, 3.0mm to 5.0mm. Aercrete Square Anchor M6 x 50 Box 100