Quick change bit kit. Includes: Unique compact design power tool bit kit. Includes most popular square and phillips drive bits in 2, 3 and 4 length. Bits manufactured from high quality tool steel and heat treated to withstand constant use in the field. Magnetic quick change chuck with high strength Alnico magnet holds bit and screw. Holder manufactured from 303 stainless steel. Easy quick release system for changing bit styles and sizes.