Install this Rip Scale Upgrade Kit and in about a half-hour, you'll be instantly setting rip cut dimensions with lightning speed and matchless precision. \n \nA powerful magnetic strip attached to the top of each rail holds your choice of a short or long precision Stainless-Steel scale that is graduated in both, 32nds and 16ths. Choose the long 45� scale when measuring cuts between 6-1/2" from the left of the blade to 38-1/2" from the right. Scales will also read in opposite direction, except numbers will be upside-down. Or, the short 16� scale when measuring cuts between 6-1/2" from the left of the blade to 9-1/2" from the right. \n \nZeroing-adjustments are easily made by simply sliding the steel scales on their magnetic holders. Once positioned, they will remain where you put them without shifting. \n \nThe kit includes: \n� A new 17-1/2" Front Rail for your main table \n� (3) 7-1/2" Front Rails for your extension tables \n� 16" Long Stainless-Steel Scale \n� 45" Long Stainless-Steel Scale \n� Wide, Easy-to-read Scale Indicator \n� Complete Instructions and All Required Installation Hardware \n \nNote: For use with MARK V 520 Pro Fence System Only.