Abstract: Drywall Shark is a specialized drywall cutter. The preferred embodiment of the invention utilizes a housing containing blades and rollers and having two levels, a lever operatively connected to the blades and a measuring line on the exterior. To use Drywall Shark, an individual slides the lever in the channel of the housing to the appropriate demarcation on the measuring line. He then locks the lever and consequently the blades in place inside the appropriate slot. The user then places the housing over the drywall to be cut and positions the blades on the outside edge of the drywall, insuring that the levels show that the housing is being held parallel to the cutting surface. The housing is then slid across the drywall leaving a groove on both sides of the drywall that extends approximately one-eighth of an inch into the drywall. The rollers near the top of the interior of the housing make this sliding motion simple to complete with one hand, leaving the operator's other hand free for other tasks.