just read the 'machinist jewellery' thread so I thought I would get another one going. I make these. They are 'titanium 5 location marker beacons'. Mostly people use them like zip pulls on jackets and such or put them on knives, keys torches etc. The inserts glow for around 25 years or so... I designed the parts in cad, prototyped them in my lathe then sub contracted the bead for production. All the finishing processes like polishing and engraving I do myself. Its quite a bit of work and I think the customer is getting a bargain for the price. Hope you like them!