Specification:
Item Type: Broken Screw Extractor
Material: High Speed Steel
Specification Diameter (Approx.) Total Length(Approx.) Thread Size End(Approx.) Shank Diameter(Approx.)
1# 4mm / 0.2in 52mm / 2in 3.0-4.2mm / 0.1-0.2in 3mm / 0.1in
2# 4.5mm / 0.2in 58mm / 2.3in 3.4-4.8mm / 0.1-0.2in 3.6mm / 0.1in
3# 6.5mm / 0.3in 65mm / 3in 4.4-4.8mm / 0.2-0.2in 5.3mm / 0.2in
4# 7.5mm / 0.3in 75mm / 3in 5.3-7.3mm / 0.2-0.3in 6.35mm / 0.2in
5# 11mm / 0.4in 82mm / 3.2in 7.4-10.3mm / 0.3-0.4in 9.3mm / 0.4in
6# 15mm / 0.6in 92mm / 3.6in 10-14.2mm / 0.4-0.5in 12mm / 0.5in
7# 20mm / 0.8in 96mm / 3.8in 11-18mm / 0.4-0.7in 15mm / 0.6in
8# 24mm / 0.9in 107mm / 4.2in 16-23mm / 0.6-0.9in 19.4mm / 0.8in

Package List:
8 x Screw Extractor
1 x Plastic Box

How To Use:
Working Principle:
The thread direction of the broken wire extractor is opposite to the direction of the general screw thread. When turned counterclockwise, the broken wire extractor is constantly tightened into the inner hole. When a certain tightness is reached, the screw rotates because reversed. Turn the screw in the direction and will naturally turn out.
Instructions:
First, choose a broken wire extractor that is than the broken screw, and then find a drill bit the same size as the thinnest end of the broken wire extractor, and then drill a deep enough hole in the middle of the broken screw. Then use the broken wire extractor to screw in the broken screw counterclockwise until the broken screw is unscrewed.

Note:
Please match the appropriate size when using