Drillpro 12-24V Mini Hand Drill Bits DIY Lathe Press 555 Motor Chuck & Mounting Bracket Power Supply: DC 12 5A -24V 3A No load speed: 8000 r/min ~28000 r/min, including forward and reverse modes 555 Ball Bearing Motor size:approx 36.5mm*75mm JT0 drill chuck: approx 21mm*37mm With JT0 precision drill chuck, clamping range: 0.3 ~ 4mm