A set of bit extensions with magnetic, quick release holders. The choice of extension lengths will help with accessing those hard to reach fixings. This high quality magnetic screwdriver bit holder has a CR-V drive shank, heat treated for strength and durability. • Lengths: 60mm (2 3/8"), 100mm (4"), 150mm (6") • Magnetic with quick release • Hex shank: 6.35mm (1/4") • Material: Chrome Vanadium Steel (CR-V) • Heat treated