Nut Extractor Socket Set, Broken Bolt Extractor, 15-Piece Set [Like New]

DURATECH Nut Extractor Socket Set, Nut Twister, Broken Bolt Extractor, Nut Remover, Stripped Bolt, Nut Extractor Socket, for Motorcycle and Car Repair, 15-piece set.
Please use this to remove broken or stripped bolts.

Purchased about a year ago for 3,980 yen. Used only once and then stored. Now selling as it is no longer needed.
There are no particularly noticeable scratches, but this is a used item, so please judge from the images (no returns accepted).

[Set Contents]: 1/4, 5/16(8mm), 3/8, 10mm, 7/16(11mm), 12mm, 1/2, 13mm, 9/16(14mm), 5/8(16mm), 17mm, 11/16, 3/4(19mm) each + two 3/8''F x 1/4''M hex adapters, storage case.
[Durable Material] Forged from high-hardness chrome molybdenum steel. Black oxide finish for durability and rust resistance. Overall heat treatment for high hardness, sturdy and not easily broken. Stable operation, accurate and reliable.
[Versatile Use] Can handle various bolts as long as the size matches, including damaged and rusted bolts and nuts. Also widely used in general industries for automotive repair, furniture assembly, machinery inspection and repair.
[Excellent Compatibility] Includes two 3/8 inch (9.5mm) F to 1/4 inch (6.35mm) M socket adapters. Suitable for hand tools as well as air and power tools.
[Includes Storage Case] Comes with a dedicated storage box to securely store the nut set and prevent loss.