Cyclone HSS Premium Grade Annular Cutter, 7 8 in dia x 2 in Depth, 3 4 in Weldon Shank, Includes Pilot Pin ORS NASCO 015 in diameter clearance Prevents metal 015 in diameter clearance Prevents metal fretting and corrosion Seals against leakage Bright yellow blade has clear easy to read numerals Hi Viz® orange case is easy to find on the job Rubber cushion case exterior protects tape from impact and improves grip Fits easily into most tape holsters Toggle lock is positioned for convenient operation Evolution standard geometry is sufficient for most drilling applications Manufactured specifically to maximize hole accuracy while minimizing cutter vibration and extending annular cutter life Using this standard geometry enhances accuracy and saves time This allows for a single ejection of slugs when drilling through stacked material