DIYers and mechanics, this Boatsea hair pin clip assortment is seriously comprehensive! You get 180 pieces total across 6 different sizes: 50pcs of 3/32x1-3/16, 35pcs of 5/64x1-5/16, 35pcs of 5/64x1-9/16, 25pcs of 7/64x1-5/8, 25pcs of 9/64x1-3/4, and 10pcs of 5/32x2-15/16. The zinc plated spring steel construction makes them corrosion resistant and durable enough for heavy use. Perfect for hitch pins, lawn mowers, trailers, automotive applications, or any mechanical project where you need to secure pins or bolts. The R-clip design makes them easy to install and remove without tools, and they provide secure locking that won't vibrate loose. The clear storage case keeps everything organized so you can quickly find the size you need. Seriously, if you're tired of searching for the right size cotter pin or running to the hardware store for one small part, this assortment has you covered for most common applications. The quality is much better than those cheap bulk packs, and having all these sizes on hand saves so much time on projects.