DescriptionNote:- since the link is a multi - attribute product, please pay attention to the title & description & then purchase. Choice available check title, mentioned in brackets at the end of the title. Fit for mini hand drill with 2.35mm and 3.17mm shaft diameter. (please check your mini hand drill first. Thank you. ) 0.5-3.0 mm proffesional small drill bit collet micro twist drill chuck set copper miniature drill chuck, and drill mix to form a hand drill ideal for combined use with a hand drill or electric drill,to drill abs,wood board,presspaper,etc. Material : brass . Package includes 1x l wrench 1x copper cap 5x brass collets (packed safely in bubble bag.)