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crimped-steel collar ring solidly connects neck and handle
impeller and rubber diffuser
Feature titanium bonded blades that are 3X harder than steel and stay sharper longer
Seal inner edge with hi-temp silicone sealant
Hillman 1/4 In. - #14 x 1 In. Washer Head Self-Drilling Sheet Metal Screw (100 Ct.) Pack options:Pack of 1 crimped-steel collar ring solidly connectsSelf drilling screws are manufactured for use in wood, fiberglass and metal. They possess a drill point which enables the screw to drill its own hole in thin gauge steel; no pre drilled holes are necessary. The sharp threads create their own mating thread when drilled into the material, and provide a stronger grip to your surface. Perfect for roofing construction, these screws have a neoprene washer that provides a water tight seal, and prevents
