Professional nibble metal cutter with double head design for efficient sheet metal cutting. Ergonomic handle provides comfort during use. Fits any electric or power drill. Serves as a convenient alternative to traditional electric or air-powered nibblers. Features dual cutting heads with 360-degree adjustability. Compact and easy to operate, reducing user fatigue. Delivers clean cuts without burrs or sharp edges. Designed for use with an 8mm electric or air drill. Ideal for automotive repair, maintenance, and metal sheet fabrication.Specifications: Model: YT-160A Cutting Capacity: - Steel plate: 1.8mm - Stainless steel plate: 1.2mm - Copper/aluminum plate: 2mm - Plastic/fiber plate: 2mm Speed: 15003000 rpm Color: Silver + Black Material: Metal Dimensions: 18 x 5.1 x 7.8 cm (7 x 2 x 3 inches) L x W x H Head diameter: 10.5mm Minimum cutting diameter: 12mm Instructions for Use: 1. Insert the drill and cutter into the hole openers round hole. Attach the cutter to the electric drill and secure tightly. Tighten the three stud screws on the bracket to prevent slippage. Insert the left and right positioning pins into the small square hole of the bracket. Adjust and tighten the top screw according to the arc size to be cut. Fix the ruler peg to ensure accurate round hole cutting. 2. For standard arc cutting, use the thin plate hole opener to achieve a smooth and clean cut surface. Drill a 3mm pilot hole first, then a 12mm hole. Insert the cutter head into the hole to cut inner and outer circles.Operating Instructions: 1. Regularly apply oil to the blade edge, especially when cutting aluminum. 2. Start the electric drill before engaging the tool. After use, disengage the tool before turning off the drill. 3. Maintain perpendicular alignment between the cutter shank and the workpiece to avoid breakage. 4. To replace the tool bar: remove the cover, take out the anti-loose nut, loosen the set screw, pull out the bar with pliers, and reinstall. 5. To replace the tool holder: unscrew the compression cap counterclockwise and install a new holder.Package Contents: 1 x Wrench 1 x Nibbler Cutter Note: Light reflection and display differences may cause slight color variation between the image and actual item. Measurement tolerance: 13 cm.