Router Bit Holder

How snug is the hole with the bit inserted? Loose fit or does the mat grip the shanks?

It's a nice slip fit-doesn't stick so you have to tug it out but isn't sloppy. It's one of those things I bought on impulse thinking it might work and did. If you've got one of those stores near you keep a 1/2 bit in your car and when you go in- try it. I'm sure other houseware stores carry the same thing. I'm always on the lookout for cross purposes in stores e.g. fly tying supplies in craft stores, hardware store for boating fittings, etc.
Mike