KELLY SPINNER (KS) is designed and manufactured under Varco 6600 (Pneumatic Kelly Spinner) and 6800 (Hydraulic Kelly Spinner) designs, which is used for rotating drill pipe slowly, for limited rathole and mousehole drilling, and for making fast Kelly connections. This unit is completely reversible, the driller can spin out, as well as spin in, and when making connections, therefore, spinning chains are not required any more.