Hmm, yes it is frustrating that only the cardboard inserts in the individual bit sale packets list each bit's recommended speed. What they're each used to do is readily available in Dremel literature but not their speeds. Kind of crazy for a multi-speed device, no? To really add insult to injury is that the speed info is printed inside the cardboard fold-over. So it can't be read without buying and opening each individual packet!!! It's not possible simply look at each packet and note the speed for the bits you got with your Dremel. I've often thought about opening a thread for users to post the speed info. Each who buys a bit separately packed posts the bit number and speed until we get them all.