Hillman 370141 0.25-20 in. Lead Caulk-in Machine Screw Anchor, Hillman, Mfr#: 51817

Features Takes 10-24 screw. Open bottom design. Coarse thread. Drill size: 1/2". 3/8"x1/2" L, requires 3/8" bit. Screw size: 1/4"-20; 7/8" L. Must be fully imbedded. Boxed/100. Specifications Dimension: 3.5" H x 4.3" W x 4.3" L Weight: 4.5 lbs