Promotional Keychains & Keylights, Knee Joint Bone Keyring - Movable Joint, Just like the real body part, this knee joint shaped keyring moves at the joint This unique and fun promotional product measures 5.5" x 5" and is a perfect giveaway suited for hospitals, radiology clinics, chiropractors, rehab facilities and much more This product is not intended for use by children or pets It may present a choking hazard to children under 3 years of age ... #24047 $1.34/each.