The<unk>  is a compound movement that works grip strength, and the primary muscles used in the<unk>  are the erector spinae, the gluteus maximus, adductor magnus, hamstrings and the soleus. 
The remaining muscles are involved in stability control. It is, in a sense, the purest single event test of strength because it is one of the few lifts of dead weight (weight lying on the ground).  In most other lifts the weight changes direction or starts in the air and several other athletic skills such as balance, coordination are emphasized.  For example, both Olympic weightlifting events require a great deal of athletic skill in addition to strength.  In addition, it is commonly believed to be the oldest test of strength dating back to cultures who competed at lifting the heaviest stones.
Deadlift
Canning
Mourning
Bedwetting
Stacking 
Passivation
Polishing 
Bandage