Crain 973 Rolling Hand GrooverThe groovers precision guide wheels track in the seam to cut a groove for heat welding. Groove starting at the middle of the seam with the front blade, then up close to the wall with the rear blade. Groove circles and curves using a clip on foot plate that allows the back end to slide Cuttings flow out under the handle, which pivots open for cleaning Adjustable blade depth Made in the USA Takes standard blades Includes: 1 8" hex key for adjustments