Cutting Depth: 1-3/8 in. 3/4 in. TCT1-KIT-13PC Tungsten Carbide Tipped Annular Cutter Kit - Steel Dragon... The Steel Dragon Tools 13-piece carbide-tipped annular cutter kit includes 11 annular bits and two (2) pilot pins. Weldon Shank Pilot Pin: 1/4 in. x 3-1/2 in. (6.34 mm x 90 mm) Pilot Pin: 5/16 in. x 3-1/2 in. (7.98 mm x 90 mm) Includes carrying case. Features: Steel Dragon Tools annular cutters will drill large holes up to ten times faster than regular drills bits. Pilot pin helps eject slug after drilling is complete. Kit includes 11 carbide-tipped annular cutters and two (2) pilot pins. Make overlapping holes, slotting holes, and edge cuts. Pilot pin helps locate center of hole location. During the drilling process, the pilot pin will retract into the cutter allowing lubrication to reduce heat gain in the slug. These bits will quickly and safely cut holes in steel. Steel Dragon Tools 13pc. Product Details So Phresh Scatter Shield High-Back Litter Box allows for easy entry and exit while the raised back wall caters to a feline's habits by guarding the area around their pan from scatter and spray Large holes can be drilled up to ten times faster than regular drills bits Annular Cutter Bits Cutting Depth: 1-3/8 in. 3/4 in. Weldon Shank Steel Dragon Tools® 2-3/8" X 1-3/8" Carbide Tip Annular Cutter 3/4