Apex Tool Company carries a full range of upper and mid stop counterbore tools. Our M series upper counterbore tools are designed to be low profile and allow in chassis shim cutting on most vehicles. These tools are designed to last for years of constant use and the plates will interchange with the Kent-Moore Porta Tool Machine. We also carry midstop and a ISX dedicated counterbore tool. Why wait for a mobile machine shop to do your counterbores? These machines are easy to use and get the job done fast and to perfection.