60mm & 100mm Screwdriver Bit Holder Set S2 Alloy Steel, With 2 x Posi No. 2 Bits Dargan 2 Piece Screwdriver Bit Holder Set | BS02/DT This magnetic bit holder is great for extending all kinds of screwdriver bits, drills, converts any variable-speed drill into a power screwdriver. Made of Chrome Vanadium steel (CR-V), heat-treated high hardness, wear resistance, durable and long service life. Built-in strong permanent magnet(the hole part), shaft holds the bit securely, great for working with hard to reach screws. Features Fit the most common drill chucks and tools. Great for working with hard to reach screws Suitable for drill, screwdriver, batch head and other to transfer.