The Drop-Kick 45 closet flange features a strong, corrosion-proof, stainless steel swivel ring and a 3-inch full flow throat. It fits securely in a 4-inch round hole with no need for notching. In situations where the rough-in for the toilet is right above or next to a floor joist, the 45° angle allows the plumber to make the glue connection while minimizing the amount of joist being knocked out. The flange is also ideal for situations where the drain line must run within a shallow ceiling cavity.