Tuff Stuff, 32904, 100 Pieces, 1/4" - 20, Double Expansion Shield Anchors. Double Expansion Shields are anchors designed to be used in concrete, brick or block. Used with a machine thread screw or bolt, the anchor expands against the concrete at two points. The expansion action at both ends of the shield distributes the anchored load throughout the lenght of the shield. This expansion anchor is recommended for shear loads or where the bolt is subjected to side pressure or vibration. Once fastened, the object may be unbolted, removed, and/or re-fastened.
Features:- Box of 100
- Diameter: 1/4"
- Drill Size: 1/2"
- Finish: Zinc
- Material: Steel