always TEST no matter what you choose to use for a marking pencil- test it on the fabrics you plan to use it on to make sure it will come out the way you expect it to---and remember to not iron (heat set) or place in a hot dryer- before all markings have been removed.

I love using mine.

They are .9mm.

Ghostrider,
Thanks for the info on the .9 mm size of the marker refills. I looked at some mechanical pencils that I have and Papermate has a .9 size. I'm going to get a refill and see how it works in the pencil. Will let people know.

I suggest you load it through the point end of the pencil. The leads are ceramic and not as strong as a graphite lead. I doubt they'd make it through the inner workings of a regular pencil without breaking up. :)

Haven't tried them yet, but have tried the "FriXion" pens that you just iron off! They work GREAT! I must say I was apprehensive to actually put it on a quilt top, but started with just a amall area...ironed it right out of there! I love this product!

I'll be watching this post for sure!