Connecting rod diameter:0.3-4mm Weight:179g Scope of application:hanging mill,bench mill,electric mill Small handle,easy to control,suitable for fine polishing,engraving,sanding operation Color:silver material:metal Size about:handle chuck 0.3-4mm Package Contents: 1x Electric hand shank 1x chuck key Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.