Manual Hand Crank Drill :A perfect hand drill tool and a chuck key,manual powered machine works with 3/8 inch drill bits, to satisfy the versatility you crave. Double Pinions Design: :This steel cast construction hand drill with comfortably smooth abs engineering plastics handle,The drill bit set is made of high-quality carbon steel material firmly connected to the shaft, and the precision claws can hold the drill tightly, strong wear resistance and high precision. The double pinion design makes the electric drill more stable and flexible. The key chuck allows you to tighten the drill bit without letting it slip, ensuring safety. No Electricity Needed :The Hand Crank Drill is no electricity needed and Double-pinion design ensures a smooth and flexible operation, great Manual drill tool for outside or when power outage. Wide Application :This Powerful Speedy Hand Drill Perfect for wood, bamboo, soft thin metal, copper, aluminum, plastic, pvc, acrylic, glass fiberboard, circuit board. This hand drill is suitable for DIY lovers,carpentry,creative production, students extracurricular activities, teaching practice and model lovers,Stimulate children's creativity and cultivate interest in handmade DIY.