Bulk Packaged. Kit includes the cutting guide, instructions, two number 560 drywall bits and one number 561 multipurpose cutting bit. Fits Dremel models 800, 780, 400, 398, 395, 300, 285, 275, 200, and 100. Will work with the Black and Decker RTX. Use on plastic, drywall, fiberglass, wood, and laminates.