the insulation thickness is different, you can adjust the height of the clamp according to wire insulation thickness This wire Strippers features steel cutter for faster cutting, enduring and wear-resistant The cable Strippers is lightweight and portable, it can easily fit into a bag or the back of a truck for easy transport and storage This cable Strippers is selected from aluminium with excellent heat resistance and stability, long service life Wire Strippers is equipped with a manual crank handle for wire stripping and ensures operational even during power outages, Manufacturer: HDOYTXXM