Streamlight illuminated handcuff key. Doubles as an emergency light. Made from machined aircraft aluminum. Comes with swiveling key ring. Combine the practicality of an extended reach handcuff key with a super bright white LED light and you have the CuffMate. Weighs only 1/2 ounce but runs 12 hours or more. The LED will last 100,000 hours. Works with all standard handcuffs. Has a double lock pin. Uses flat lithium batteries.