#9 x 1-1/4" Quik Drive CB3BLGHL Cement Board Collated Screws, High-Low Thread, C-3 Galvanized, Pkg 1500 Zinc Large Diameter Concrete Screws it is made from high-quality

it is made from high-quality silicone that resists extreme temperatures

This will only fit a joist that measures an actual 4"x6"

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Simpson Strong-Tie Drop-In setting tools are the ideal solution for accurately and consistently installing Simpson Drop-In internally threaded anchors

#9 x 1-1/4" Quik Drive CB3BLGHL Cement Board Collated Screws, High-Low Thread, C-3 Galvanized, Pkg 1500 Zinc Large Diameter Concrete Screws it is made from high-qualityStrong Tie Quik Drive CB3BLG cement board screws are designed to quickly and easily fasten dense fiber cement boards to wood. Designed for use with these Quik Drive Attachments PROLDH