a) Leg pad qhov siab hloov kho kom tau raws li cov kev xav tau ntawm cov neeg sib txawv.
b) Ergonomic tsim tuav ua rau txoj haujlwm kev cob qhia yooj yim dua.
c) Nrog lub zog siab engineering yas barbell raj tiv thaiv npog.
d) Nrog limiting mechanism kom muaj kev ruaj ntseg ntawm tus kws qhia.