The WIDDER 18806 Large Blade Guide is used with the 10267 Pneumatic Hacksaw or the 18800 Hydraulic Hacksaw to stabilize the saw blade to reduce vibration and whipping. The guide clamps onto the work piece and helps extend the service life of a saw blade, straighten the cut and help prevent blade snapping. The 18806 is used for pipe in the 12″ to 24″ range and fits a 37″ long blade.