RUIMI New Professional Countersink Drill Bit Set Reamer Woodworking 5 Flute Chamfer 3mm-6mm Carpentry DIY (CC-1) (CC-1) (AA-1) Portable mini hand drill multi-tool chuck A great helper for carving,DIY,woodworking,electronic assembling, tool-making, model making Can't be used on steel, iron, stone and hard things Hand-pressure rotary drill hole, saves your time and effort and convenient for you to use FITS IN PLACES A POWER DRILL CAN'T: Long, slender design lets you drill holes in cramped areas