General description Simple and practical, this 8-piece Magnetic Bit Holder Extension Screwdriver Adapter Hex/Square Assortment is easy to use and ideal for drills and impact drivers, making it perfect for both professionals and DIY enthusiasts. These essential accessories are designed for electric screwdrivers, pneumatic screwdrivers, and other power tools. Technical specifications Material: CRV Shank Diameter: 1/4" (6.35mm), 3/8" (9.53mm), 1/2" (12.7mm) Package Contents: 8 x Magnetic Screwdriver Bit Holders Assortment Usage These magnetic bit holders are essential for various power tools, providing a reliable connection for efficient screw driving and fastening tasks.