Material: plastic

Size: cage size same as the picture show

Item include 2*key+1*cage+4*ring

When you want take it off, insert the key, rotate it, and pull out the lock and key together, then take off the cage and ring.

 CAUTTION: PLEASE LOCK OR UNLOCK GENTLY IN CASE OF TWISTING OFF THE KEY!

The lock and key are both made from brass and key is silver plated surface. As brass hardness is not high, brass key could be snapped if it's forced to take off with to much power. Thus it's important to take key off gently.