Park's Master Chain Tool is designed specifically to work with the tight tolerances and narrow profiles of 10, and 11-speed chains and most high-quality derailleur chains. It uses an integrated link pocket to ensure precise alignment and also features perfectly contoured, cushioned handles for comfort and ease of use. (The CT-4.2 is not compatible with Wipperman chains.)
We use this tool every day in the shop, multiple times per day. After about 2 years, we've never had a pin break. Metal shavings do collect around pin from chains, and needs to be cleaned off after about 20 chains or so.
Bottom LineYes, I would recommend this to a friend