The invention features an indexable wear platepiercing tip insert that is configured to be removably and repositionably attached to the front, nose portion of the upper, movable jaw of a metal demolition shears. The methods provide for the direct identification of compound structure following combinatorial synthesis using molecular mass measurements of individual compounds, thereby eliminating the necessity of encoding synthetic steps. A hammer moveable along the length of the elongate member impacts against said stop for pulling said tool holder from said base block mounting. Electropotential and impedance are measured at one or more locations. Conversely, in its second position, the handle is at least partially contained within the interior of the lint roller support for compact storage, display andor transportation.