This travel-sized toolbox-to-go is a handy helper for a variety of tasks! A hollow handle contains four screwdriver bits (Flat-head 3.0 and 4.5 and Phillips-head #1 and #0 sizes); simply select the appropriate bit, and pop it into the receiver end to use the tool. Attached clip keeps tool securely stowed in your pocket or purse. Plastic housing; chrome-vanadium screw bits. 1/2" diameter x 4 1/4" long.