New Dremel 678-01 Circle Cutter & Straight Edge Guide This innovative attachment is the simple way to cut circular holes in many types of materials. It attaches easily to the Dremel High-Speed Rotary Tool and cuts perfect circles from 3/4" to 12" in diameter. The attachment has convenient measurement guides in both inches and centimeters, so you can cut out the right-sized circle every time Makes circles from 3/4" -12" (1.9-30 cm) Precision stamped steel construction for accuracy and durability. Attaches quickly and easily without tools. Depth adjustment allows easy setting of the correct cutting depth Straight Edge Guide allows routing or cutting in a straight line Includes Circle Cutter Attachment Straight Edge Guide Instructions Fits Tool Model:: 275, 285, 300, 395, 398, 400, 770, 780, 800