Hand Crank Drill: A perfect hand drill tool and chuck key, the hand crank machine works with 9.5mm drill bits, to satisfy the versatility you need. < p>Double Gear Design: This hand drill is made of cast steel with comfortable and smooth ABS plastic handle. The drill set is made of high quality carbon steel firmly connected with the shank, and the precision claws can hold the drill firmly, strong wear resistance and high precision. The double sprocket design makes the electric drill more stable and flexible. The keyed chuck allows you to clamp the bit without letting it slip, ensuring safety. No Electricity Needed: The hand crank drill is no electricity needed and the design to double sprocket ensures smooth and flexible operation, great hand drill tool for outdoor or power outage. Wide Application: This powerful fast hand drill is perfect for wood, wood, bamboo, soft and thin metal, copper, aluminum, plastic, PVC, acrylic, fiberglass boards, circuit boards. This hand drill is suitable for DIY enthusiasts, carpentry, creative production, student extracurricular activities, teaching practice and model making enthusiasts. Stimulates children's creativity and cultivates interest in handmade DIY. Common drill chuck: The hand crank drill adopts ordinary manual drill chuck, which has high clamping precision , and the drill bit is not easily caused by breakage."