Abalone divers normally use a very thick wetsuit, including a hood, booties, and gloves. They also wear a mask, snorkel, weight belt, abalone iron, and abalone gauge. It is common to take abalone in water a few inches up to 10 m/28' deep. Fewer freedivers can work deeper than that. Abalone are normally found on rocks near food sources (kelp). An abalone iron is used to pry the abalone from the rock before it can fully clamp down. Visibility is normally five to ten feet. Divers commonly dive out of boats, kayaks, tube floats or directly off the shore. An eight-inch abalone is considered a good catch, a nine-inch would be very good, and a ten-inch plus (250 mm) abalone would be an excellent catch. Rock- or shore-picking is a different method from diving where the rock picker feels below rocks during low tides for abalone.