Unremovable Plan-B Medical Bracelets for Extreme Alzheimer's and Autism. For big, strong people that reject bracelets and can break our standard versions, this heavy duty design is unbreakable. It does not have an unremovable clasp. Instead, it requires closing the last open jump ring with two pliers. You may need a jeweler to close it for you. For proper "Sizing" or call 1-847-638-2223. After required size confirmation, allow for 3 day custom sizing before shipping. Signup for E-deals. Read what customers say. For AirTag®, MotoTag® versions, the device inside is not included and sold separately. Need more information: call 1-847-638-2223.