For all you DIYers and mechanics, these 170mm internal C-clips are the kind of hardware you definitely want to have in your toolkit! Made from black alloy steel, they're seriously durable and resistant to rust and corrosion. Each clip measures 179.5mm outer diameter, 161mm inner diameter, and 3mm thickness - perfect for those larger applications where standard sizes just won't cut it. You get two pieces in the package, which is great because you always seem to need a spare. The internal design means they work inside housings and bores to secure components in place. The snap ring style makes installation and removal relatively straightforward with the right tools. What's nice about the alloy steel construction is that it can handle significant pressure and vibration without failing. Whether you're working on automotive projects, industrial equipment, or heavy machinery, these provide reliable retention. The black finish gives them a professional look and adds some extra corrosion resistance. They maintain their spring tension really well, so once they're seated properly, they're not going anywhere. Definitely industrial-grade quality that outperforms cheaper alternatives. Keep a few of these around and you'll be surprised how often they come in handy for various repair and maintenance jobs!