If you've called Circo Innovations, you've probably heard someone say: "Snap — like snap your fingers. Clamp — like clamp something down." We've been explaining the name since 1996. After 30 years, the product still raises that question from first-time callers, so here's the full answer. The Simple Explanation A Snap Clamp is a U-shaped plastic clip that snaps over PVC pipe to hold a covering material — poly film, shade cloth, netting, tarp, canvas, or fabric — against the pi