Cyclone HSS Premium Grade Annular Cutter, 13 16 in dia x 2 in Depth, 3 4 in Weldon Shank, Includes Pilot Pin no checkout protecting knees against hard surfaces Lightweight protecting knees against hard surfaces Lightweight and has a built in handle making it easy to carry and transport and convenient to hang and store Water resistant and petroleum resistant construction make it perfect for everything from bath time to work in the garage Designed for kneeling on cold surfaces longer lasting replacement for cotton or leather gloves Lightweight 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