Torque Master Tools Private Limited manufactures Heavy Duty Industrial Sockets. Torque Master Tools Private Limited is an ISO 9001:2000 certified company. The Heavy Duty Industrial Sockets are designed for hand operation only and are available in 1/4" to 1/2" square drive covering Bolt/Nut across flat sizes 4 to 34 mm. Heavy duty sockets are available in 3/4" and 1" square drives covering across flat sizes from 19 mm to 85 mm. These heavy duty industrial sockets are designed with a positive locking for its attachment with the driving tools having spring loaded ball and button. Deep sockets are also available to accommodate long studs.