[APPLICATION]: The wire formed pins are used as a pin locking device to hold pins or castle nuts in place in automotive, axles, trailer hitch and tractors, and are highly versatile fasteners.[PREMIUM QUALITY]: Each high-quality pin is constructed with zinc plated steel that stands the test of time, and ensures that replacements are not needed for your fastening jobs.[EXTREMELY DURABLE]: The heavy duty material allows for durability while the hair pin style design gives a fast and secure hold for bolts to ensure stability.[SECURE DESIGN]: The specialty lock ensures a tight lasting hold and comes with a key that opens four types of lock.[CONVENIENCE]: Every set comes with a see-through resealable storage case storing all material together for portability, organization, and is easy to identify size markings.[INCLUDES]: Sizes: 150pcs- 1/16"x1" and 3/32"x 1", 100pcs 3/32"x1-1/2", 75pcs 1/8"x1-1/4", 50pcs 1/8"x 2", 30pcs 5/32"x1-1/2".