NIUNIU MULTI-PURPOSE: You can quickly and correctly adjust the cutting depth according to your needs, and you can quickly complete rotary drill positioning, engraving, slotting, reaming, etc. CLEAR AND PRECISE DIGITAL SCALE: The large window design provides excellent visibility, which is convenient for you to record and adjust the data that needs to be cut to better control the electric drill. EASY TO INSTALL: Direct installation is very easy to use, without the help of any auxiliary complicated tools, you only need to spend a few minutes to replace different drill bits. HIGH-QUALITY MATERIAL: The drill bit and milling burr are made of high-quality steel, and the scale shell is made of high-grade plastic, which is strong and durable. Delivery Quantity: 1set of 11pc, (6PC rotary file (high speed steel 4241) + 4pcs 3mm twist drills (high speed steel 4241) + single black horn cover) Package Contents: Only the above package contents, excluding other products. Size: rotary file 40mm, twist drill 60mm, black horn cover 60x32x42mm (Reminder: The size is measured manually, please allow 1-2 cm measurement error) Colour: Black (Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.)