X-bits. The most versatile bit for all types of wood and wood composites up to 1″ thick, fiberglass, solid surface material, vinyl siding, aluminum siding, plastics, and laminates. Precision of 1/8″ bits and strength of 1/4″ bits. 5/32″ shank. For use in Rotozip cut-out tools. 2 bits per pack.