Fury Double Lock Handcuff w/Keys FP. Specifications for Fury Double Lock Handcuff w/Keys: Manufacturer: Fury Blade Material: Steel Features of Fury Double Lock Handcuff w/Keys: Patented Design Made with a Lightweight Design Meets or Exceeds Military Specs Zinc Oxide anticorrosive coating Welded chain with heat-treated internal lock Package Contents: Fury Double Lock Handcuff w/Keys Fury FP15902: Double Lock Handcuff w/Keys