Abstract: A material collider having a pair of rotor assemblies respectively housed within a pair of interconnected cylindrical chambers with a plurality of disc members secured thereto, at least one thrust guide secured to the disc members and a weir secured to the inner periphery of the cylindrical chambers.

Abstract: A housing mounts a continuous side wall formed with a cutting edge arranged in a single plane, with the housing including a top wall, with a projecting flange extending upwardly of the top wall in an orthogonal relationship, and an upper distal end of the flange including an impact plate fixedly mounted thereto. In this manner, impact of the plate effects projection of the cutting edge into a sheetrock member to define a rectilinear cut for mounting of an electrical socket tool therewithin.