Features a bit holder with a magnet to hold the bit steadily Can still be easily removed or changed Hollow end for loose bit storage Allow for a convenient and secure fit Lengths listed are blade lengths on a 4-1/4" handle. Overall Length will be blade length plus 4-1/4" handle Magnetic Acetate Handle Multi Bit Screwdrivers feature an ergonomic acetate handle with a hollow end for loose bit storage. 1/4" Shank Interchangeable Bit Screwdrivers are compatible with 1/4" insert bits.