The Trend Loc Block consists of four interlocking gripping blocks that lock together to allow the workpiece to be held in place when sanding, drilling and finishing. No need to use clamps. Sets up in seconds by gripping the workpiece and bench, raising the workpiece from the bench, to allow complete access to every edge. Size when four blocks interlocked 173mm x 173mm. The Trend Loc Block is a set of four interlocking gripping blocks designed to securely hold your workpiece in place during sanding, drilling, and finishing. Eliminate the need for clamps with this quick and easy setup. Simply interlock the blocks to grip both the workpiece and your workbench, raising the piece for complete access to all edges. Features Four interlocking gripping blocks Securely holds workpieces for sanding, drilling, and finishing No clamps required Quick and easy setup Raises workpiece for complete edge access Specifications Size (interlocked): 173mm x 173mm