Tired of your boat drifting away at the sandbar? These dock sand augers are a game-changer. You get two in a pack, plus the screws and nuts you need to install them. They're designed to fit inside 1.730-inch OR 1.790-inch inner diameter PVC tubing (which is super common), and that tubing usually fits over a standard 2-inch outer diameter aluminum dock post. So, here's the deal: you take a piece of PVC pipe, drill a hole near the bottom, slide this auger in, bolt it tight, and then drive the whole thing into the sand or mud. It creates a super secure anchor point for tying up your boat. The black plastic is key – it's a military-grade composite that's totally rust-proof and resists salty, corrosive seawater way better than metal. It won't scratch your boat either. Works great in sand, clay, mud, even bottoms with some small stones. A heads-up: if you're using 2-inch PVC tubing, the fit might be a little loose; for 1.5-inch tubing, you'll need to heat it a bit to expand it and get the auger in. Super reliable for making your own DIY sand anchors.