Zinc Nailon Nail Expansion Pin Drive Anchor, Diameter: 1/4 IN, Length: 1 IN, Minimum Embedment Depth: 7/8 IN, Drill Size: 1/4 IN, Head Type: Mushroom, Material: Die Cast Zinc Alloy Body, Carbon And Type-304 Stainless Steel Pin, Tension Strength: 225 LB, Shear Strength: 225 LB, For Anchoring And Fastening Systems In Concrete And Masonry