Stronger for a long period of use: our hand retractable spring plunger uses quality metal to make, stable and not easy to break, safe and reliable, stronger for a long period of use Small in size and light in weight: the plunger spring is 1/4 inch - 20 thread size, 0.500 inch thread length, small in size and light in weight, so you can carry it out anywhere, store it anywhere you need without much burden or space, also it will integrate into your toolbox completely without any Improve your work efficiency: no threading or tapping required, it only takes a few minutes to install these boat quick release pins, saving time and effort, greatly improving your work efficiency Widely applicable tool: the stainless steel lock-out M6 type quick release pins mainly can be applied in rolling toolbox, mould, chassis, cabin, electrical appliances, industrial equipment, automotive and more, also they can replace and change the key ring pin, which will be more elegant and Daily use: you will get spring pins in M6 type, enough quantity for using in different at one time, also you can replace the broken one in time. Material: Stainless steel + metal + alloy steel colour: black Package Contents: 1 set x tool box accessories(4PCS) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.