“Looking for regular residential brass or reinforced security grade?” he asked.

“Reinforced,” I said, pointing at two heavy yellow boxes on the top shelf.

“Grade one solid brass deadbolts with hardened steel throw bolts inside.”

“Going on an outside entry door?”

“A solid oak front door,” I said.

“Four-pin hinge frame.”

The clerk reached up, took down the two yellow boxes, and set them in my wire cart.

“This model comes with standard three-quarter-inch mounting screws,” he said, turning one of the boxes over in his hands.