"This 19063 valve spring compressor tool is designed for use with Briggs and Stratton small engines and is compatible with replacement part 750-174. It is used for compressing valve springs during engine service tasks. The manual screw system allows controlled spring compression when removing or installing valve components. Metal construction supports regular use in garages and small engine repair shops. It can be used on lawn mowers, generators, and other small engine equipment. This product includes 1 valve spring compressor tool."