Sturdy to Use: our hand retractable spring plunger is made of quality stainless steel, tough, stable, rust resistant, and not easy to break, which is safe and reliable to you for a long time Tiny and Compact: the lock out M6 type measure 12.5 mm/ 0.5 inch in thread length, light weight, which can be carried around and stored in the tool bag or toolbox, without bringing burden or taking too much space Quick to Install and Release: in no need of threading or tapping, the spring plunger pin is quick to install, saving your time and improving your work efficiency Wide Applications: the stainless steel quick release pin can be mainly applied for rolling toolboxes, moulds, chassis, cabs, electrical appliances, industrial equipment, automobiles, etc., which is also suitable for replacing the key ring pins for a connection Sufficient Replacements: you receive 4 pieces of locking quick release pin to meet and solve the trouble of temporary replacement parts Features: These steel lock pins are