About this item 

• HIGH-QUALITY MATERIAL：The product is made of premium Manganese Steel，Spring steel construction for flexibility, balance, durability and black oxide finish resists corrosion. 
• DESIGN FEATURES: Apart from industrial applications, the slotted spring pins also service for DIY makers. You can use them to hold cogs, wheels etc, or to insert them into a hole of slightly smaller diameter so they can provide a secure anchorage for items such as pulley wheels and gears, much neater than cotter pins. It's a split pin that securely joins two shafts together. Also can remove and re-use roll or spring pins. 
• EASY FOR STORAGE AND RECOGNIZING: Plastic storage case has compartments for roll pins of different sizes, easy for neat storage, as well as a specification card that lists sizes of hollow pins, clear to read. 
• WIDELY USE: Ideal for machine, small equipment and repairs, roll pins smoothly drive out hollow pins or springs. Widely used for automobiles, mechanics, mechanical industry, car garage, workshop, electrical appliances, pistol service and repairs, No matter you a professional or amateur, it will do a satisfactory job for you. 
• PACKAGE: Set has total of 120pcs, different sizes of spring pins,It comes with a plastic box with individual compartment to spring pins in order, quick and convenient to pick up the size you needs.