Tom, they are the round ones, #32 to be exact. PM me your address, and I will stick a couple in an envelope to you. I'm waiting for IWF, because Klingspor usually does a "deal" on replacement pads for ROS. I have two right angle, and three of the 333 / 334 that need new pads. Savings on pads will pay for one night lodging (if they do the "deal.)Bruce