Product: Double-head screw extractor
Specifications: 1#, 2#, 3#, 4#
Material: 4341 high-speed steel, alloy steel (S2), much better than the chrome-vanadium steel material on the market. It is no problem to take wood screws.
The S2 material extractor is now marked as #1, #2, #3, #4
The marking of the high speed steel 4341 extractor is HSS 4341 #1