Specifications: Universal 1/4inch quick hex shank and 1/4inch hex socket fit most electric drivers, hand-held drivers and bits. Drill bit extension holder are made with a high quality steel with heavy duty construction to ensure maximum efficiency. The magnetic holder can firmly hold the screw to prevent the bit from slipping, thus prolonging the service life of the bit. Item Name: Screwdriver Bit Holder Material: Aluminum Steel Features: Magnetic, Hand Tool, Quick Release Size: 1.2cm x 1.5cm/0.47" x 0.59" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Screwdriver Bit Holder (Not Including Connecting Rod)