Simply insert any standard bit into the socket or use as a 1/4 in. NutdriverFeatures and E-Z Spin high torque rotating flip cap with built in bit storageHolds up to five extra insert bitsThe Quick-Change Screwdriver (driver only) is the ultimate multi-bit tool. Simply insert any standard bit into the socket or use as a 1/4 in. Nutdriver. If you need to switch to a different bit, just pull back the gold knurled collar, remove the bit, and snap in another; its that easy! The tail-end features an E-Z Spin high torque rotating flip cap with built in bit storage that holds up to 5 extra insert bits.