These MasonMate Loose Bolt Shield Anchors have the following specifications: Size: M10. AnchorHoleSize: 16mm. Shield Length: 60mm. Thread Diameter: 10mm. Fastens up to: 75mm. Bolt Length: 140mm. Min.HoleDepth: 65mm. Qty. Per Box: 25. The MasonMate Loose Bolt Shield Anchors are for use in most types of masonry or concrete. Zinc plated for increased durability. M10 x 75mm (25)