● Optimum tool head for long life use. ● Rigid self- centering chuck with precise inching sliding and finger protection slider. ● Working table with carving ruler. ● Alloy gearbox with accurate conformity force transfer. ● Bead breaker cylinder made of aluminum to resist rust. ● Pedals assembly for fast service design. ● Motor with copper-wire winding rotator and aluminum radiation housing. ● Rim protection kits incl. ● Low profile/large size wheel as optional series.