Hello all! I saw a video on youtube about pinning a razor and they say to use a ball pein hammer, but they didn't say what size. I have found a sight that has Ball pein hammers from 1 oz. on up. I already have a small hammer for working on watches. Is this to small? Thanks for stopping by! Here's the site to find them; Hammers and Mallets - Lacy West Jewellery Tools and Supplies