This one-hand operation accessory quickly inserts into the chuck of a corded or cordless drill to make clean straight, circular, or square cuts in asphalt shingles. A sleek, lightweight aluminum cast shear head and molded drill clamp allow maximum portability and ease to go wherever the work is. The compact telescoping drill clamp adjusts to fit both length and width of popular drill sizes including smaller bodied impact drivers. Optional spacers are stored on clamp for large motor housings. A clamp collar allows the shear head to be rotated 360° and set in any position for optimum tool clearance when navigating roof lines or to facilitate easy material flow. Use this versatile TurboShear drill attachment to make fast, clean, trim cuts in asphalt shingles along a roof valley, or tight left square cuts and circles to fit around utility outlets, with equal precision and ease. An extra-wide jaw opening with beveled lead-in tip on the upper blade accommodates multiple shingle layers. And a wide, flat lower blade offers exceptional operator control. Heat-treated carbon steel blades with solid carbide inserts hold their edge longer in any life-rated shingle or shingle thickness. A lateral blade adjustment capability ensures that optimum cutting performance and maneuverability can be maintained for the life of the blades. Replacement blades are also available and easily installed on the job. The TSS1CEV model includes a handy carrying case.