Grip-Rite PrimeGuard Plus #10 x 2.5 In. Hex Washer Head Structural Screw (25-Count) Master Mark Designed to fit with 3-1/4"

Designed to fit with 3-1/4" x 10" or up to 8" round duct for flexible installation

quiet-running trimmer

Polished brass finish

and are completely waterproof

and many more commercial applications

Grip-Rite PrimeGuard Plus #10 x 2.5 In. Hex Washer Head Structural Screw (25-Count) Master Mark Designed to fit with 3-1/4"Dual drive power head offers flexibility to choose either the included hex driver or star drive bit to fasten the screw. Type 17 point for quicker penetration into the wood. A 3 digit code is stamped into the head for easy spec reference. Faster lag screws in exterior structural wood applications no pre drilling. Approved for use in treated lumber. Free bit included.