The Matco Top Torque II red line extension screwdrivers have different handle sizes based on screwdriver length to properly match the handle size with the screwdriver application. Handles are molded around the blade via a butterfly shank for greater strength and durability, while providing a non-slip grip with the patented flocking surface. A greater proportion of soft material on the handle surface provides a better feel and improves comfort in thumb placement. The tools include a bolster hole for extra turning power.