Handcuffs 1020 Carbon Steel, but with all pins, springs and rivets in Stainless Steel AISI 304 Anti Rust Double safety lock Nickel plated, colored or camouflaged models, have a double safety lock with a triggering device located on the inside (not apparent) of the handcuff, preventing its opening without the appropriate key, toothed closing handle with sliding guides to prevent its opening by pressure or strokes, closing ratchet with three teeth, accompany two keys also produced in AISI 304 Austenitic Stainless Steel