Roberts Long neck Jamb & Undercut Saw RWS169 this Roberts Jamb saw is bigger with 6.5" tungstan carbon blade than the original Roberts jamb & undercut saw. This can deal with door jambs and skirting boards. With the Jamb saw it is easy to adjust the blade hight from the floor with just a thumb screw. The blade will run flat to the floor as the blade abore is resessed out of the way and up to 26mm high, however this means original Roberts replacement blades are the only blade available. The Roberts long neck jamb saw comes with one blade and release tools inside a plastic box. It has a 1050 watt motor which puts out 8000 RPM on the blade.