eBay

PACKAGE INCLUDED -- Comes with 50 pieces blank pins and 50 pieces butterfly clutch backs, all in bronze color.
SIZE DETAILS -- Tie tacks diameter is approx. 11mm, blank pin flat pad diameter is approx. 10mm, pin length is approx 9mm.
SECURE DESIGN -- Metal butterfly clutch provides good grip of pin to keep it stay in place securely and firmly.
EASY TO USE -- Featuring a spring-loaded fastener, these butterfly clutch backs are easy to put on and take off.
MULTIPURPOSE -- Use for lapel pins, tie tacks, citation bars, service bars and jewelry, good for jewelry making and DIY craft projects.

Tie Tacks and Clutch Backs Set, 50 pieces Bronze Tie Tacks Blank Pins with 50 pieces Butterfly Clutch Pin Backs Locking Clasps
Blank Pin Specification :
Material : Copper
Color : Bronze
Pin Flat Head Diameter : approx. 10 mm
Pin Length : approx. 9 mm
Quantity : 50 pieces
Pin Back Specification :
Material : Copper
Color : Bronze
Pin Back Diameter : approx. 11 mm
Quantity : 50 pieces
Features :
Well-made Butterfly Pin Back :
The pin backs can stay secure on the pin's shaft and are preferred due to its easier gripping and durability.
Easy to Use :
No tools are required, butterfly clutch with spring fastener allow you to install and remove it easily, handy and convenient for use.
Multiple Purpose :
good for jewelry making; You also can use the tie back to fix object, such as photos, fabrics, cloth, map, scrapbook, etc.
Package Includes :
50 x Tie Tacks Blank Pins
50 x Pin Backs