subang 40 pieces metal pin backs locking pin keepers locking clasp with storage case subang <br><b>feature:</b> <br>this listing is for 40 pcs low profile locking pin backs/pin keepers-highest quality, best available; suitable for all pin post pins, especially for disney pins, harley pins; <br>great alternative to those standard butterfly clutches and the rubber backs; these pin backs are very easy to use; no tools required; just push on the pin back to the pin nail and it is locked; the harder you pull the pin, the tighter it will lock; pull the spring loaded botton at the rear, then the pin will be released ! low profile, smooth surface, no finger stabbing, no pin post protruding any more! <br> <br><b>specification:</b> <br>material: nickel-plated copper <br>product size: circumference approx 15cm/5.9 inch(unstretched); <br>product weight:0.04 ounces*40 <br>package size:3.22*2.36*0.59inches <br>package weight: 2.41 ounces <br> <br><b>package includes:</b> <br>- 40* locking pin keepers backs <br>- 1* storage case