This twist hand drill is made of alloy for durability and long service life The hand drill chuck has a narrow range from 0.3mm to 3.6mm which can fit for many sizes of drill bits With small size and light weight, this hand drill can fit into many tool bag and you can take it anywhere Hand twist drill is quite easy to use and can be used to drill many things including PCBs, jewelry, watches, etc It is a great tool for PCB manufacturing, watch repair, craft work, jewelry hanging or souvenir making