Replacement for damaged socket when caster is still good (or you bought casters from a source that doesn't include sockets). 1 piano caster/wheel mounting socket. 7/16" inner diameter (where the stem of the caster itself fits). Darnell style socket - but - be sure to check your casters, these sockets are made for a caster with a 7/16" grip ring style stem (5th pic shows a grip ring stem) and some Darnell casters have 1/2" stems. Mounting plate is 2 1/8" diameter and 3/16" thick. Socket stem mounts in approx 13/16" hole. This style socket is stronger than the stamped type socket but it's still important for the stem to fit tightly in the leg to prevent damage to the socket once weight is put on it.
I've been servicing pianos full time since I was 17 years old (30+ years) and in that time have serviced/replaced casters on hundreds of pianos - antique uprights, spinets, consoles, studios, square grands, baby grands and grands. I'm glad to answer questions about this product before or after the sale - my contact info is included in each shipment and you can also reach me through eBay.
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