Features: With professional design,the product own great efficiency,labor-saving,practical. The product with exquisite appearance and excellent durability, durable. It is lightweight,convenient to carry, and easy to use. A set contains different size screw extractor,well meet your various needs. This product also belongs to broken stud spanner,which can take the broken stew out. Specification: Material:tool steel Type(optional):five-piece set six-piece set Article: Five-piece set # 4.0 mm/0.16 in # 4.5 mm/0.18 in # 6.5 mm/0.26 in # 7.5 mm /0.3 in # 11 mm /0.43 in Six-piece set # 4.0 mm/0.16 in # 4.5 mm/0.18 in # 6.5 mm/0.26 in #7.5 mm/0.3 in #11 mm /0.43 in # 15 mm/0.59 in Scope of application 3-6 mm/0.12-0.24 in 6-8 mm/0.24-0.31 in 8-11 mm/0.31-0.43 in 11-14 mm/0.43-0.55 in 14-18 mm/0.55 - 0.71 in 18-22 mm/0.71-0.87 Package List: 1 Set * Screw Extractor 1、With professional design,the product own great efficiency,labor-saving,practical. 2、The product with exquisite appearance and excellent durability, durable 3、It is lightweight,convenient to carry, and easy to use 4、A set contains different size screw extractor,well meet your various needs 5、This product also belongs to broken stud spanner,which can take the broken stew out.