I would use those when I don't have the original broken off part to glue back together. Sometimes we get those in our bargains. 73, Bill KU8H On 11/26/2015 10:41 AM, Dale Parfitt wrote: > My preference would be a keyway replacement from Antique Electronic Supply: > https://www.tubesandmore.com/products/P-STKY-1 > > Dale W4OP > > > >