Simpson Strong-Tie Screw Anchor, Series: Titen, 1/4 in dia, 5 in OAL, Hex Head Drive, Carbon Steel, 1 in Minimum Embedment Depth, 3/16 in Drill, Zinc Plated, Applicable Materials: Concrete and Masonry, 250 lb Shear Strength, 150 lb TensileTiten Screws are Hardened Screws For Attaching All Types of Components to Concrete and Masonry. The se Fasteners are Commonly Used in Applications Such as Attaching Electrical Boxes, Light Fixtures or Window Frames Into Concrete or Masonry Base Materials.