Feature:1. 40Cr: These screw and nut extractors are made of excellent 40Cr and quenched at high temperatures to ensure high hardness, no slipping, no fracture, and extended service life.2. Spiral Pattern: With deep spiral twisted pattern design, these extractors are specifically designed to solve rusted hex screws, easily penetrating the rust layer and increasing grip, making disassembly easy.3. Good Adaptability: These nut extractors have a multi shaped opening design, making them suitable for a variety of tools such as cross wrenches, open end wrenches, pneumatic wrenches, and damaged nuts.4. Kit Specifications: This kit provides 6pcs spiral groove extractors, 13pcs multi spline extractors, 6pcs bolt extractors, and a left hand drill bit to meet your various fastener disassembly and removal needs.5. Wide Application: This bolt and nut extractor set is suitable for roof maintenance, repair workshops, machinery workshops, tire maintenance, and other scenarios, with a wide range of applications.Specification:Item Type: Screw Nut Extractor SetMaterial: 40CrSpecification: 26 Pieces.Package List:6 x Spiral Flute Extractor13 x Multi Spline Extractor6 x Bolt Extractor1 x Left Hand Drill Bit1 x Plastic Box