Punch up through 20 ga (0.9 mm) steel studs in one strokeAluminum head provides strength with minimum weight, reducing operator fatigueContoured handle design gives better operator leverage and makes it possible to punch in tight placesSelf-stripping design eliminates punch hang-upsAutomatically centers holes on standard studsConversion kit available to up grade early models from 24 to 20 ga maximum capacityPunch up through 2-1/2 in 20 ga steel studs