Received a call to look for a group of keys that he thought he had lost shoveling the driveway. One of the keys was to his car, which he could not move. Also a series of house keys and others. I started to search with CTX 3030. Found a lot of metal interference. Took rake and searched my signals along with my pinpointer. Nothing! There was a large pile of snow near some steps with a metal railing. Decided to use the pinpointer and buried it into the pile. BINGO!!