"HILLMAN" LAG SHIELD 100 Pack, 1/4 Short, Lag Shield, Drill Size 1/2", Minimum Embedment 1". Features:- Size: 1/4" Drill Size: 1/2" Min. Embedment: 1" Base Material: Brick, concrete, hollow block Holds Up to (4000 psi Concrete): 75 lbs Holds Up to (C-90 Block): 45 lbs Holds Up to (Brick): 50 lbs 100 per pack.