Features 1、Excellent Maneuverability: The installation tool in this thread repair kit is made of high speed steel material, which provides excellent maneuverability 2、45# Steel Insertion Piece: The insertion piece is made of heat treated 45# steel, which can improve strength and service life 3、Protect From Wear: Drill and tap kits are ideal for repairing spalled or damaged female threads and performing maintenance work to protect any threads from wear 4、With A Storage Box: Come with a convenient storage box, which can hold and organize all parts for easy transportation and storage between jobs, very practical 5、Convenient To Use: In the field, the drill bit quickly creates space for installation tools to smoothly install and repair the old threaded blade, interrupt the tool to clean things for use Specification Item Type: Thread Repair Kit Material: High speed steel + 45# steel Specification: 125 Pcs/set Tap: M5, M6, M8, M10, M12 Purpose: Thread repair Package List 100 x Spiral Coil 5 x Installation Tool 5 x Tap 5 x Twist Drill 5 x Hex Wrench 5 x Destruction Tool