Adjustable Screw Depth Magnetic Screwdriver Bit Holder 1/4 Inch Hex Driver 

✦ Ready to use for impact driver and electric drills for quick change and adjustment.
✦ The bit holder is magnetic and allows you to adjust the depth of the screw depending on your job.
✦ Made of high quality steel to give you long lasting and maximum durability.
✦ The magnetic screw bit holder accepts any 1/4" hex shank accessory.
✦ Ideal for wood work, wood framing, carpentry,installing plywood subfloor and building crates and more.