The Alaskan 654 handcuff key is the biggest key we sell. The key was designed and patented by an officer at the Anchorage PD. It allows an officer to easily use it while wearing protective gloves, winter gloves,or mittens. The officer can immediately find it on his keyring. If dropped, it can be easily and quickly found, and anyone with large hands can use it with ease. This key offers more leverage than other handcuff keys. Excessive force will break key tip. Not warranted against accidental breakage.