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 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 , saving time and effort, greatly improving your work efficiency 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 Widely applicable tool: 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 be more elegant and, Weight: 0.18518830008 Pounds, Manufacturer: Reeatel