A hammerlock is a shoulder lock similar to the double wristlock where the opponent's arm is held bent against their back, and their hand forced upwards towards the neck, thereby applying pressure to the shoulder joint. The hammerlock is well known as a pain compliance hold in law enforcement where it is typically used from a standing position and is also utilized in the application of handcuffs. It is also sometimes seen used as a submission hold in submission wrestling arts. In physical assessments it is similar to the "Inferior Apley's Scratch" test that health practitioners may use for rotator cuff pathologies.