In March, the company is introducing the next generation of its 2-inch collated auto-feed screwdrivers in traditional corded versions as well as new, compact 18-volt Li-ion battery powered units that can drive between 500 to 700 screws per charge, depending on the screw length and substrate. Enhancements to the line include higher torque motors, application-specific tool speeds (2,500 or 5,000 rpm), a variable speed trigger with lock and reverse options, and a patent-pending corner-fit feed system, for better access and screw placement in tight spaces. A locking depth of drive adjustment regulates the precise depth needed for flush drives or countersinking screws. Other DuraSpin features include a tool-free screw length adjustment (1 to 2 inch) and a belt hook. The tools are ergonomically designed for use with one hand, however, a cushioned second hand grip helps minimize wrist and arm fatigue by reducing the exertion needed to complete each drive.