Reddit reviews EuTengHao 60 Pieces Pin Keepers Pin Locks Pin Backs Locking Clasp Locking Pin Keeper Backs Locking Pin Backs (9mmx5.5mm,Silver)

Package Includes 60 locking pin keepers and 6 locking tools (micro hex tool). The color is silver.Suitable for locking pin backs also are suitable for pins, insignia, name tags, display books, lanyards, bags, vests, hats, badge, collectibles and so on. You can pin your badge on clothes, bags or jeans.Perfect Size: Size of locking pin keepers are 5.5 mm in diameter, 9 mm in height and the locking tool is 4.5cm.These bulk pin backs are made of nickel-plated copper, durable and anti-rust. Smooth surface, sturdy and lock your pins firmly, without worrying they will fall off and provide you replacement to the torn screw or wrench locking mechanism; Keep your objects in place during important moments.How to use: Put the black screw into the middle hole, then use a small wrench to screw half of the black screw to ensure that the fixed, fixed into the brooch or medal needs to be fixed to the other two ends of any small hole, then use a wrench to tighten the black screw gradually, to ensure that the fixed.