Drill size: 3/16", Min. embedment: 7/8". Base material: Brick, concrete, drywall, hollow block, plaster. 4-6-8 x 7/8" Drill size: 3/16" Min. Embedment: 7/8" Base material: Brick, concrete, drywall, hollow block, plaster Holds Up to (1/2" Drywall): 10 lbs Holds Up to (4000 PSI Concrete): 30 lbs 75 per pack.