It's called a "Screw Punch" because when you press down on the handle, the spring like mechanism in the shaft kind of screws the punch tube into the leather...or cloth...or whatever material you want to use it on, cleanly and smoothly. Many times it can be difficult holding a drive punch with one hand while reaching for your mallet with the other...This eliminates that difficulty! It easily works on leathers from 1 oz. up to about 8-9 oz. you can use it on 10 oz. leather but then you would have to exert some effort and you might have to push the punch a couple of times before the hole appears ...so if you need to punch holes in 9-10 oz. leather... save yourself some energy and use a regular drive punch.This works on garment leathers as well as firmer leathers, upholstery as well as tooling leathers. (If you use this on garment leather, you will have to hold the leather down or else the leather will spin around). This Screw Punch comes with 2 replaceable tubes; sizes 2.0 & 2.5 mm, but we stock replacement tubes ranging from 1.0 mm up to 4.0 mm.
