Lightweight and compact body, reduces risk of health problem Li-ion high capacity battery Brush less twisting motor Reduces tying time #5 x#5 rebar up to #7 x #8 The MAX RB518 rebar tier is both lightweight and has a compact body. It is a one hand operation and ties approx 120 times per coil. The RB518 uses 21 gauge wire and ties up to #5 x#5 to #7x#8. Battery and charger included.