Material: These Bolt Extractors are made of steel material, offering high hardness and strength. It is not prone to breakage, ensuring long term durabilityEasy Removal: Damaged bolts, and nuts can be easily removed with this extractor tool set, saving time and effortConvenience: High visibility size sign for quick identification.Versatile Use: This Easy Out Bolt Extractor Set is great for various applications in your home or professional workspace. It's an essential tool for any repair or maintenance task.Portable: Comes with a storage box that stays organized and takes your set on the go Specification: Material: Steel Color: Multicolor (Carrying Case Color Random) Size Chart: Inner Diameter 8mm 10mm 11mm 12mm 13mm 14mm 15mm 16mm 17mm 19mm 21mm 22mm 24mm 27mm 1/2 Square 12.5mm Package Includes: 16 Bolt Extractors with Rods 1 Storage Box (Color Random) Note: Please allow slightly errors due to manual measurement and different monitors.