Straight back frame with formed nylon6 cross members. Pistol grip handles with knuckle guards fitted to tall loop. Stair glides with replaceable low-friction polymer skid bars. Extruded aluminium toe-plate with folding option. Puncture proof tyres on 3-piece reinforced steel hubs. Quality semi-precision bearings for smooth roll under load. Wheel guards to minimise rain splash and stabilise load. Magnesium axle brackets.