If you are doing woodworking and has a problem with the stripped bolt or screw, this set of extractor might help a lot. They works great to remove a damaged screw.

Features:
High speed steel with titanium coating.
Comes in with a handy plastic case which holds them in place.
Remove stripped or broken screws and bolts quickly and easily.
Includes 3 (1#, 2#, 3#) screw extractor and 1 saw drill in one set.
Threaded head, which has stronger holding power and better to use.

Specifications:
Material: High-speed steel 4241
Surface Treatment: Titanium plating
Model: 1#(no.6+8), 2#(no.8+10), 3#(no.10+14), saw drill: 8mm
Package Weight: Approx. 103g / 3.63oz
Package Size: Approx. 12 * 5.5 * 1.7cm / 4.72 * 2.16 * 0.67in

Package List:
3 * Screw Extractor
1 * Saw Drill

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