Aluminium box section extrusion with milled top and  base;

Hand grips to assist user, one horizontal and two vertical vials;

Accuracy o.5mm per 1m = 0.029 in standard position

DL: 5502-1        600mm

DL: 5502-2        900mm

DL: 5502-3        1200mm

DL: 5502-4        1800mm