The Perfect Slice large cookie sheet is more than just your everyday bakeware: it's a convenient way to make sure your cookies, bars and brownies are perfectly sliced every time. The unique guideline grid on the included silicone sleeve allows you to easily line up the included Perfect Slice cutting tool and cut the perfect portion size. Make perfectly-sized slices every time. Dishwasher safe. Includes: cookie sheet; silicone sleeve; cutting tool.