Normally it is 3/4" but I would take an adjustable just in case. Mark -----Original Message----- From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org]On Behalf Of Gary Sent: Tuesday, June 07, 2011 7:13 PM To: pianotech at ptg.org Subject: [pianotech] lyre bolts Going to tune a Mason & Hamlin grand Thursday and the bolts to attach the lyre were lost. Anyone know the size, or maybe suggest a range of sizes to take with me? I don't know if it's the original M&H or the Aeolian. Thanks for any help. Gary
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