A really good Milanese strap. The locking mechanism looks like it's milled metal. It looks and feels really solid and the metal is smooth allround. No sharp edges, no hairs being pulled out of the arm. It fits my small 17cm wrist fine with one hole to spare. There's no micro adjustment on this strap but you don't need it either. The distance between the holes is small enough (about 6.5mm) to make it fit right. You do have a lot of material thickness at the bottom of the wrist. 3 layers of metal adding up to 9.7mm at the fastener and 6.2mm at the thinnest point. But it is so comfortable to wear that this really doesn't matter. I'm glad I got this, to go with my SD1957 Sea Ghost and I will certainly be buying more of these.