McKenzie Mitts Handcuffs. Kansas [?], 1925. Nickel-plated set, joined with chain at the palm, each hand stamped “Patented March 10—‘25”. Rust to surface and interior. No key. 7” long. From the Kolar Collection. Rare. Invented by Jacob Oliver McKenzie, a sheriff from Phillipsburg, Kansas, the “steel mittens” were devised after a handcuffed prisoner captured by McKenzie grabbed the sheriff’s gun and shot him in the leg. The mitts were intended to immobilize a prisoner’s hands entirely while restrained.