Model SC-201 from Ultimat Safety Cuffs. These use push-button double locking and are made entirely of high strength plastic.
Model SH-101 hinged handcuffs from Ultimat Safety Cuffs.
Model SCT-201 handcuffs - training version. These can be unlocked by rotating the orange knob that replaces the normal keyway.
Model SHT-101, another training model that operates exactly the same as the previous model.