Frozen hammer rail screws

[Keith McGavern]

>Paul Tizzard wrote,
>"Last week I assessed a piano at a local school that has all of the
>hammer rail screws "frozen" in the rail. The school is near the coast
>and the piano is in their hall. There is definitely a lot of moisture
>around generally. Does anyone have any suggestions on how to free the
>screws? ...

Hammer rail screws? (hammer flange screws?)

Grand piano? If yes, all that should be required is a screwdriver 
that fits the slot as much as possible, and a pair of pliers. While 
gripping the flat part of the screwdriver blade with the pliers and 
turning the screw at the same time with the other, you'll have plenty 
of leverage. Tiny tweaks of leverage both directions should solve the 
situation.

Choice of pliers for me are the shank knurling pliers.

Keith McGavern