I use them both on a daily basis with no issues. I suppose week minded people may have issue with them.or they think they do. both systems are quite eazy ans work finer than frogs hair. personaly i think we have 2 systems due to the tool company's cumming up with a way to double, tipple&quadruple those prophets.... and more. the more you have the more you can loose and just have to replace....and while im hear...I want that too!!! sneekey tool company's at work. it also seems to work for carbide inserts too