Lag Shield Anchor Diameter 1/4 in Overall Length 1 in Screw Size 1/4 in Thread Size 1/4 In.-20 Thread Depth 0.5 in Thread Type Lag Bolt Material Zamac Alloy Finish Zinc Plated Drill Bit Size 1/2 in Minimum Installation Depth 1 in System of Measurement Inch Expansion Anchor Type Lag Shield Anchors Material Grade/Class Not Graded Compatible Material Block Brick Concrete Drywall Installation Method Lag Screw Minimum Hole Depth 1/2 in Manufacturer Location Made in USA