Material & Quality: High quality trailer hitch pins are constructed of zinc plated steel, zinc plated steel allows for durability and is corrosion resistant while its hair pin style design ensures fast and secure hold for bolts for greater stability.It has a long service life, durable and steady not easy to break, ensuring replacements are not needed. Reasonably Packaged Value Products: Hairpin Clip combines 6 most popular sizes(42pcs 3/32"X 1-3/16" 30pcs 5/64"X1-5/16" 25pcs 5/64"X1-9/16" 25pcs 7/64"X1-5/8" 20pcs 9/64"X1-3/4" 8pcs 5/32"X2-15/16" ), which can satisfy your different needs, 150pcs R Clips are enough for multiple see-through resealable storage case packs all material together for portability, organization, and makes it easy to identify size markings which means you can easily find the cotter pin you need. Easy to Use: High quality hair pin cotter pin hitch pin assortment kit easy to fit and remove. R clips design can quickly and safely fix the bolts and pins, so that your work never shrinks. Insert the R shape pin into hole directly and it can lock the bolt fast and effectively. It gives fast and secure hold for bolts, easy to install and remove. Wide Application: Our hair styled cotter pin set has 150 pcs in a box that comes in 6 different sizes is widely applied for holding bolts and pins, used for automotive, mechanics, car garage, workshop, power equipment, cars, trucks, lawn mower, small engine repair and fastening. Works great for repairing any mechanical, automotive, or small engine. Quality Assurance: Customer satisfaction is our pursuit. We have full confidence in our products. If you are not satisfied for any reason within 30 days, please return your tool kit without any questions. We also provide 7*24 customer service.