Feature: Ergonomic design handle for comfort. Double Headed Metal , Fits to any electric or power drill. Convenient and Perfect alternative to the traditional electric or air powered nibbler. Double cutting head and 360 degree adjustable. Compact size, easy to operate and labor-saving. Excellent cutting effect without any burrs and edges. It should used with an 8mm electric drill or an air drill. Suitable for car repair and maintenance and metal sheet productions. Specification: Model: YT-160A Cutting capacity: Steel plate: less than equal 1.8mm Stainless steel plate: less than equal 1.2mm Copper/aluminum plate: less than equal 2mm Plastic/fiber plate: less than equal 2mm Speed: 1500-3000rpm/min colour: Silver+black Material: metal size: 18 x 5.1 x 7.8cm / 7inch x 2inch x 3inch(L*W*H) Head diameter: 10.5mm Minimium cutting diameter: 12mm Instructions for use: 1. When using the thin plate hole opener, first insert the drill front end and the cutter into the round hole of the hole opener, connect the cutter to the electric drill and lock it tightly, and then tighten the stud screws of the three branches on the shelf to prevent the hole opener from sliding; put the left and right positioning pins upwards into the small square hole of the shelf, and finally adjust and tighten the top screw according to the size of the arc to be cut, and fix the ruler Peg to ensure the accuracy of cutting round holes. 2. When cutting the standard arc, please use a thin plate hole opener to keep the circular cut surface smooth and beautiful. It is also necessary to drill a 3 mm positioning eye, then drill a 12 mm hole, and insert the cutter head into the hole to cut the inner and outer circles. Operational requirement: 1. It is important often oiled on the blade edge, especially for cutting aluminum plates. 2. Open the electric drill and then use, when finished, please exit and then close. 3. When cutting, the cutting edge of the shank must be perpendicular to the object being cut to prevent the hard shank from breaking. 4. Tool bar replacement: open the cover, take out the anti-loose nut, loosen the set screw, pull out the tool bar with pliers, and reinstall it. 5. Tool holder replacement: unscrew the compression cap counterclockwise and replace it with a new one. Package Contents: 1x Wrench 1x Nibbler Cutter Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.