?Metric Flange Bolt Assortment?This is nice selection of metric flange head bolts of the most common lengths along with the nuts and washers, Including M6-1.0 x 12/16/20/25/30mm, M8-1.25 x 16/20/25/30mm, M10-1.5 x30mm, 280pcs in total. The fully threaded design ensures a secure and stable fit in a wide range of applications. ?10.9 Alloy and Black Galvanized?This flange bolt kit is crafted from 10.9 grade alloy steel with a durable black galvanized finish. If you're working inside the engine, you'll need high-strength Class 10.9 bolts on hand. Class 8.8 bolts are not rated for high-torque conditions. ?Time Money Saver?Great bins for storage with a size chart on the inside and outside. Compared to the time it takes to go to a hardware store and the cost of buying individual packs, this flange bolts nuts washers kit is a time and money saver. ?Wide Applications?The flange has serrations grip that increases the torque needed to loosen the bolt, which is perfect for mounting something that exposed to vibrations and harshness during action. Widely used in home improvement, automotive projects and engineering test labs. ?Reusable Container?Everything is sorted in separate compartments that are labeled, which is nice when you're looking for a specific size. You can also reuse the plastic container after you've used all the flange bolt kit. The quintessential toolbox addition for any DIY enthusiast.