The Nite Ize S-Biner MicroLock is perfect for removing keys in a hurry if you popping out for a run or want to leave your it with a friend.  When the key is attached you can rest assured it is safe due to the durable plastic locking arm that prevents the gate of the carabiner from opening accidentally.  Available in both Stainless & Black finishesHigh quality stainless steel constructionSecure stainless steel wire gate closureDimensions: 1.39\" x 0.59\" x 0.27\" 35.46mm x 15.08mm x 7.07mm Weight: 0.14 oz 4gWeight rating: 3 lb.