Spyder's Rapid Core Eject™ arbor system to remove cores without prying - drill hole, press button, pull back the hole saw, and eject the core - up to 5x faster than standard hole saw arbors. Cut at an angle, and use two adapters (second adapter sold separately) on one pilot bit to enlarge existing holes. All Hex8 Spyder hole saws fit on Spyder Rapid Core Eject™ arbor/pilot bits, or use your favorite hole saw (with a 5/8-18 thread) with the Spyder Rapid Core Eject™ arbor system. Always use a drill motor that is equipped with a support handle. High speed steel (HSS) pilot bit drills wood, metal and plastics Spyder's Rapid Core Eject™ arbor removes cores without prying, cuts at an angle, and enlarges existing holes Spyder Hex8 pilot bit - 3/8-in hex, 1/4-in HSS drill bit Spin on, spin off saw mounting 2-7/8-In drilling depth Always drill using a drill motor that is equipped with a support handle For use in standard rotary drilling mode - not for use in hammer or impacting drill modes Hex8 3/8-in arbor fits hole saw cups ranging in diameter from 3/4-in to 1-1/8-in Use with Spyder's arbor #600868P Bit Diameter (Inches): 1/4-in Hex Size: 8 Pilot Bit Length: 7-1/8-in Material: High Speed Steel Package Quantity: 10 Warranty: None CA Residents: Prop 65 Warning(s): Yes UNSPSC: 27112800