NBJF = 152mm x 254mm or 6" x 10"Faceplate WorkholdingVertical Boring Mill JawsJ = 6"/152mm = Longitudinal Anchor Hole Center Distance E = 10"/254mm = Overall Length of the Jaw"NEW VERTICAL & HORIZONTAL FACE PLATE WORK HOLDING CHUCK JAWS"
152mm (6") Center Distance Of Anchor Holes x 254mm (10") Overall Length

