Description Description Description: Durable: Manual telescopic spring plunger is made of quality stainless steel, stable and not easy to break, safety and reliable, durable for use. Portable Hand Retractable Spring Plunger with Knurled Handle : Small and lightweight, so you can carry it anywhere and store it wherever you need it without too much burden or space. Easy to Use: Plunger Spring No threading or tapping required, installing these quick release pins takes only a few minutes, saving time and effort, greatly improving work efficiency. Widely Apply: Stainless steel type quick release pins are mainly used in rolling tool boxes, chassis, engine rooms, electrical appliances, industrial equipment, automobiles, etc. They can also be replaced with keyring pins to make them more elegant and sturdy. Material: Stainless Steel, Round Head, M6-M16 Type, it will be fully integrated into your toolbox without any conflicts. Specification: M6: 12.7*26.4mm M8: 15.8*32.8mm M10: 19*38.3mm M12: 25.4*44.8mm M16: 28.6*50.9mm Package Includes: 1pcs Hand Retractable Spring Plunger Note: Please allow slightly errors due to manual measurement and different monitors.