WEICHUAN Manual Hand Drill 3/8-Inch Capacity-Powerful and Speedy, Manual 3/8 inch Mini Hand Drill with Finely Cast Steel Double Pinions Design, 3 Jaw Chucks and Grip Handle Product description: A real tool, this 3-jaw chuck, manual powered machine works with 3/8 inch bits(1.5mm - 10mm), to satisfy the versatility you crave.