The longer black tool is a cir clip instillation tool ( Fits mercury , Mahle and Wizard pistons ) , The shinny cylinder is a ring compressor used to compress rings and install piston in bore with EASE , no more JUNK expandable ring compressors and the flat piece that the piston is lying in is a piston table to hold piston firmly so cir clips and wrist pins can be installed and removed , instead of rolling around on a table or being held with a vise that WILL cause piston damage..Will cut these job times in half and will save money on damaged parts...
Jay