Expansion Screw Anchor Lead Length 1 1/2 In Screw Size 1/2-13 Internal Thread Size 1/2-13 Drill Size 7/8 In Min Embedment 1 1/2 In Ultimate Tension in 3000 PSI Concrete 1600 Lb. Use With 4XGE7 Application For Use with Light Duty Concrete Block Brick and Stone Application Package Quantity 50