length : other is_customized : Yes Use : Metal Drilling Material : High Speed Steel Model Number : drill bits DIY Supplies : Woodworking Type : Center Drill Bit : NIUXIANG Origin : Mainland China Certification : CE Note:The deeper the hole, the easier it is to remove the screw. Description: *The 6piece screw extractor set works with any drill and any screw size or bolt, *Great for stripped, broken, stuck or damaged and screw removal. Screw Remover -Removes any stripped screw in 10 seconds or less! Instructions for use: 1.Select screw remover that is smaller than the damage screw. Use a drill to turn a hole deep enough in the middle of the screw head. 2.Take out the screw remover then reverse the screw extractor 3.Hand drill is turned counter clockwise slowly to drill,but do not use high-speed drilling Specification: Color: Silver/Gold Material: tungsten carbide tip Length: 51mm/ 2.01inch Package includes: Option three: 4 PCS X Screw extractorswith box(Silver/Gold) (The specific size is described by the picture)