For convex cutting.shear scraping is a recently enhanced method of woodturning which relies on the presentation of the scraper at a shear angle. The 3/8" square shank sits firmly on the toolrest & presents the cutter at 45º to the workpiece when used in either direction. This is due to the unique cutter seating position. Each tip can be repositioned several times before resharpening becomes necessary. Complete with two double-ended hss tips, hss cutter & allen key & full instructions. Swivel tips can be set at any angle for hollowing in blind holes..