These panel pilot bits have a pointed tip for plunge cuts and a special grind for speed and an integral solid pilot. It is designed for fast cut-out work and is used extensively in the movile/motor homes, caravans, Star wagons, trailers, coaches, RV Industries and shed manufacturers., The single-flute version cuts fast and produces an excellent finish., #45506, diameter (D) 1/4, cutting height (B) 3/4, shank (D) 1/4, overall length (L) 2-1/2, flutes 1, 45506 carbide Tipped panel pilot concave grind 1/4 dia x 3/4 x 1/4 inch shank Single flute