Various sizes:This spring kit includes extension springs and compression springs in 20 different sizes, 200 pieces in total., the types are fully adapted to your different needs
Durable materials: The material of the spring is iron, durable and long-lasting
Reasonable placement:Parts of different sizes are organized in 12 compartments for your convenience
Plastic box storage:The plastic case is durable, compact and lightweight for easy storage and portability
Wide range of applications: Widely used in construction, stores, hand tools, machinery, airplanes, electrical appliances, furniture, replacement parts, repair and maintenance of all kinds of tools and equipment