The Home Depot, Amazon.com and Craftsman sell torque wrenches. Craftsman only sells its own brand, with wrenches ranging in diameter sizes from 3/8 inch to 1/2 inch.
The Home Depot and Amazon sell torque wrenches for bolts with diameters of 3/8 inch, 1/4 inch and 1/2 inch. Most are manual, but some are electronic. Some of the manual torque wrenches, such as the one by Tekton, make a clicking sound when a user achieves the desired torque value. The GearWrench electronic torque wrench, available at The Home Depot, can measure the maximum amount of torque required to remove an installed fastener.