A revolutionary way to convert standard bits to magnetic bits! Fits virtually any standard screwdriver bit. Increases productivity by easily locating fasteners and eliminating dropped fasteners. Reusable and interchangeable - once a bit is worn out, simply remove your Mag-O-Netr and slide it onto the next bit. Lifetime guarantee on magnetic pull. For 3/16" shank bit. Non-Stocking Item. May Require Additional Time To Ship.