3/16″ Hex Shank Drill Bit, Split Point Tip Prevents Walking, Black Oxide Coating Provides Longer Life, Rapid Load System Has Durable Rubber Finger Grips For Comfortable Use, Impact & Rust Resistant Nickel Plated Nose, Stainless Steel Interior Parts & A Pressure Activated Ball Groove System For Rapid Loading & Strong Retention, Rapid Load Provides Quick & Easy Accessory Changes Without Rechucking, Accessories Have A Hex Shank Locking System To Prevent Slipping, The Rapid Load Holder Fits All Brands Of 3/8″ & 1/2″ Cordless & Corded Drills.