The disclosed invention provides for a lockable grass trimmer rack. Next, the frozen waste resources is crushed in an crushing apparatus, after which the freezing gas is separated from the crushed waste resources in a separate apparatus and the freezing gas for is collected the purpose of reuse. Such sampling or sensing may be provided by a downhole tool in accordance with some embodiments of the present invention and the downhole tool may be used for production logging, formation testing andor the like. Next, the hole is filled with a supporting metal. The finder eliminates the need for calculations to find the true edge and the risk of contact damage to the workpiece or precision tool.