They indicate that they are designed for 1/4 "Perforated sheet metal, but they aren't. They have 1/8" mounting wires that are 1/4" deep. Yes, they work with 1/4" holes and are deep enough to tap into a 1/4". -Punch board to fit, but you need to order some hole locks to keep them on the peg board or they will come loose every time you pick up your instrument.
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