Shadow Hunter Elevators Structural Screws - 50 Pack - Elevators 1/4 x 2-1/2in Structural Lag Screws feature SPAX PowerLag design and thread technology. No pre-drilling, drive faster, and easier than conventional lags and other structural screws. Made in the USA (1 Box Contains 50 Screws) BUILT ON WASHER: 0.697in Head design eliminates the need for a separate washer NO PRE-DRILLING: Allows for faster, easier installation BUILT TOUGH: Heat Treated to Grade 5 durability with a High Corrosion Resistant Coating. 1,169Lbs of Tensile Strength, 766Lbs of Shear Strength. MULTIFUNCTIONAL: Elevator Structural Screws can be Used on Pre Treated Wood to Build Deer Blinds, Treehouses, Swing Sets, Observation Towers, Hunting Platforms, and More! PATENTED DESIGN: Features SPAX patented thread technology BUILD BETTER PLATFORMS: Elevators Structural Lag Screws were Designed to Work with Elevators Brackets to Ensure the Safest and Strongest Platform Combination Available BIT INCLUDED: T-30 Bit Included in Each 50ct. Box of Elevators Lag Screws MADE IN THE USA: Elevators Structural Screws are the Made in the USA by SPAX