Drill America DEWEZ Series Scew Extractors (Sizes #1 - #12), Hardened Carbon Steel Product description (optional) : Drill America DEWEZ Series are made from heat treated carbon steel. They are used expressly for removing broken or seized screws. #1 - Screw Size Up to 3/16" #2 - Screw Size Up to 1/4" #3 - Screw Size Up to 5/16" #4 - Screw Size Up to 7/16" #5 - Screw Size 9/16" - 3/4" #6 - Screw Size 3/4" - 1" #7 - Screw Size 1" - 1-3/8" #8 - Screw Size 1-3/8" - 1-3/4" #9 - Screw Size 1-3/4" - 2-1/8" #10 - Screw Size 2-1/8" - 2-1/2" #11 - Screw Size 2-1/2" - 3" #12 - Screw Size 3" - 3-1/2"