You can use the magnetic screw ring to easily and quickly absorb screws and hold them in place to help prevent drill bit slippage. High-precision coaxial shaft provides strong clamping force to help reduce slipping and improve efficiency. Made of metal material, the magnetic screwdriver bit ring is durable. The length of the magnetic ring is 2.1cm, the width is 1.2cm, and the height is 1.2cm. The clamping diameter is 6.35mm. Universal magnetic ring fits various screwdriver bits, power bits, and drill bits. Item Name: Screwdriver Bit Magnetic Ring Material: Metal Color: Blue, Black Features: Multi-use, Secure Fit, High Strength Size Details: Size: 2.1cm x 1.2cm x 1.2cm / 0.83" x 0.47" x 0.47" (Approx.) Clamping Diameter: 6.35mm / 0.25" (Approx.) Notes: Using Instructions: 1. Insert the magnetic ring onto the 6.35mm bit. 2. Confirm that the magnetic ring is securely fixed on the bit. 3. Place the screw on the bit with the magnetic ring in place. Due to lighting and screen setting differences, the item's color may vary slightly from the images. Please allow slight dimensional variations due to manual measurement. Package Includes: 1 x Screwdriver Bit Magnetic Ring