"Like all things, this is only as strong as its weakest part. What is the point, therefore, of marketing a product based on it having a metal chassis, when the only thing keeping the surform blade attached to it is a plastic bolt and tightener. Well, I used mine twice, and the plastic bolt sheared rendering it useless. Sure, I could replace the bolt with a metal one, but why not just make the product fit for purpose in the first instance? Best avoided."