Lag Shield Anchor Diameter 5/16 in Overall Length 1 1/4 in Screw Size 5/16 in Thread Size 5/16 In.-18 Thread Depth 0.75 in Thread Type Lag Bolt Material Zamac Alloy Finish Zinc Plated Drill Bit Size 1/2 in Minimum Installation Depth 1 1/4 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