I'm an amateur carpenter and I needed a fairly accurate contra-angle to add to my collection. This guy is just right. I've looked at some of the other ranges in this category, the best aircraft quality aluminum machines and I couldn't justify the cost considering I'm not a professional carpenter or joiner. The build quality is good and I find it very accurate. I use it several times a week to make sure some of the projects I'm working on are the right ones. I keep it in my apron pocket and have dropped it several times with no problem so far I think it's a great product for the price.