Description Packing list: 0.6-10mm manual twist drill *1 Note: (Each set includes one chuck key, no twist drill bits) Manual twist drill use: water, plastic, rubber, soft metal, bodhi, amber, bone Olive pits, amber beeswax, dentine bone Clamp the drill bit with stable precision chuck, close well with high concentricity, stable and not easy to slip Smooth, quiet, quiet bearings with wide hand twist drill bits High quality smooth and silent bearings bring comfortable drilling feeling. More precise and quieter! Product Name: Large Head Twist Drill Bit Material: high quality steel Length: 112mm Weight: 197g (216g with key) chuck clamping range: 0.6-10mm High quality fine polished steel The handle is made of high quality steel, rustproof, smooth and burr-free, and the exquisite appearance is so attractive. High quality chuck for large head hand drill Using Sanou chuck, quality assurance. Plum blossom is easy to grasp The tail plum blossom bearing, round gear-shaped design, comfortable and labor-saving one-handed operation experience. How to use the hand drill 1. Prepare the punch tool 2. The hand drill finds the right bayonet of the drill bit 3. Tighten the nut 4. Turn the hand drill to make holes Please allow slight deviation in the measurement data and make sure you don't mind before ordering.