Chuck Size 1/4 3/8 Optional 3/8" Portable Hand Crank Drill Mini Manual Drill With Double Palm Drills For Forest School Made of high quality steel with advanced long service life. High Quality: A perfect hand drill and chuck wrench, a manual actuator machine works with 1/4 or 3/8 inch drill bits, to satisfy the versatility you dream The chuck of hand crank drill is adjustable which ensures you can install drills of different sizes. DRILL DOUBLE PINION CRANK MANUAL HAND HELD WOODEN HANDLE KEYLESS CHUCK DRILLING Brand new £8.89 Free international postage With double pinions drive system, it can be used smoothly and improve your work efficiency. Crank Drill Bit, 1/4 Inch, 3/8 Inch Mini Mutual Portable Chuck Perfect for wood, bamboo, soft thin metal, plastic, PVC, acrylic, glass fiberboard, circuit board and more.