Hand Drill Machine is manufactured from the finest quality cast iron frames .It is 1/4 Inch or 6 mm. Hand Drill Machine meant for real work and is useful for all woodworkers from student to seasoned .This is a really handy tool to have when you have to drill a hole and an electrical socket is not readily available. Smooth-acting, hand-cranked drill employs stout, twin metal gears, heavy-duty 1/4 inch chuck, and comfortable wood knobs for long-term durability.