Used to replace a pad on my Ryobi RS 115. It takes a bit of work but seems to work well and you can also use 5" rims which are lighter and more affordable. It will cost $9 but it was a good grinder. You will need a 3/16 and 3/8 drill bit. Just place your old pad on top of these and then twist it into the space between the holes. with and drill with 3/16 and countersink with 3/8. If you have searched you will see that this is a discontinued model. Then replace the screws. Viola!
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