Specification Brand : SUBANG BulletPoint1 : Package includes 30 pieces pin backs with 30 pieces strews, 4 piece of locking tools,enough quantities for your need, all in a small clear storage case packed to avoid locking pin backs losing. BulletPoint2 : Locking pin keepers are 6 mm in diameter,5 mm in height,small screws are 3 mm in length,the locking tool is 4.5cm. BulletPoint3 : Pin keepers are made of nickel-plated copper material,which makes them sturdy,durable,reusable and features smooth surface,doing a good job in locking your pins firmly. BulletPoint4 : Pin keeper backs are suitable for pins,insignia,name tags,display books,lanyards,bags,vests,hats,badge,collectibles,Disney pin Locks and so on.You can pin your badge on anywhere you want. BulletPoint5 : 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,that could be easy to use. Collection : All Color : Black 30 Pieces Department : Unisex Adult ExternallyAssignedProductIdentifier : 8043618869210 ExternallyAssignedProductIdentifier1 : 606157640566 ExternallyAssignedProductIdentifier2 : 614878458957 ExternallyAssignedProductIdentifier3 : 0606157640566 ExternallyAssignedProductIdentifier4 : 0614878458957 FinishType : glossy GemType : No Gemstone GpsrSafetyAttestation : 1 ItemName : SUBANG 30 Pieces Pin Keepers Pins Locks Pins Backs Locking Clasp Locking Pin Keeper Backs with 3 Wrench All in Storage Case,5mm x 6mm ItemPackageDimensions_Height : 10.8966 centimeters ItemPackageDimensions_Length : 1.6002 centimeters ItemPackageDimensions_Width : 8.3058 centimeters ItemPackageQuantity : 1 ItemShape : Drop ItemTypeKeyword : jewelry-making-pin-backs Manufacturer : SUBANG Material : Brass Material1 : nickel plated Material2 : Copper MetalType : Brass ModelName : Locking Pin Backs-001 ModelNumber : SU1980 NumberOfBoxes : 1 NumberOfItems : 32 NumberOfPieces : 30 OccasionType1 : Anniversary OccasionType2 : Birthday OccasionType3 : Women's Day OccasionType4 : Valentine's Day OccasionType5 : Wedding PartNumber : SU1980 ProductDescription : Feature: This listing is for 30 pcs Low Profile Locking Pin backs/Pin Keepers-Highest Quality, Best Available; Suitable for all pin post pins, especially for disney pins, harley pins; Great alternative to those standard butterfly clutches and the rubber backs; These pin backs are very easy to use; Low Profile, smooth surface, No finger stabbing, No pin post protruding any more!