FIRSTINFO Power Drill Nibbler Punch Metal Sheet Cutter with Extra two punches Operation video https://www.youtube.com/watch?v=2dqz2hvzf1E Use to cut sheet metals. ; Any power drill , with key chuck of 8mm (5/16"); Fit to all power drills with 43 mm length of drill clamp. Any power drill , with key chuck of 8mm (5/16") , with speed range of 1500 to 3000 RPM. Comes with extra 2 pcs punches; total 3 pcs punches. Replacing punch and die features a " Quick Change " function. Made in Taiwan with high quality for durable use.