4 hole punch. Self-rimming double bowl kitchen sink has two full-size double bowl compartments. The flat mounting surface accommodates the latest faucet designs. The 1-1/2 in. rim radius makes the countertop cut-out an easy retro fit application. Faucets not included. Complies with: ANSI A112.19.4M, WW-P-541, HUD-FHA-VA. 33 in. x 22 in. x 9-1/2 in.