For all the mechanics, DIYers, and repair folks out there - this Keadic roll pin set is one of those 'why didn't I get this sooner' kind of tools. You get 405 pieces total across 27 different metric sizes, from tiny M1.5 all the way up to M10. These slotted spring dowel pins are perfect for all kinds of repairs and projects - automotive work, machinery maintenance, home improvements, you name it. The split design means they compress when you insert them, then spring back out to create a tight, secure fit that won't work loose from vibration. They come in a nice organized storage case with separate compartments for each size, so you're not digging through a messy pile trying to find the right one. The black finish gives them a professional look and some corrosion resistance. Whether you're working on cars, motorcycles, industrial equipment, or just tackling projects around the house, having this comprehensive assortment means you'll always have the right size roll pin when you need it. No more running to the hardware store mid-project or buying individual pins at ridiculous prices. The quality is solid - these aren't flimsy pins that'll deform when you try to install them. This is one of those sets that pays for itself the first time you use it on a repair job. Seriously handy to have in your workshop!