Features: This is a comprehensive thread repair kit for repairing sump, gearbox and differential drain plug threads. Provides new enlarged thread and replacement drain plug screws for use when existing threads are damaged or worn. Used to tap the damaged thread slightly over size, then fit a new drain plug and washer supplied. This set is suitable for the most popular threads used on cars and light commercial vehicles. Manufactured from the highest quality steel, hardened and tempered for maximum durability. Blow moulded plastic case keeps all the tools organized and easy to transport. Professional tool for commercial or occasional use. Specification: Condition: 100% Brand New Material: Metal Item Color: Silver + Golden Box Color: Red Package Weight: approx.1750g/61.7oz How to Use: 1. Disassemble the damaged oil drain screw 2. Choose a tap for example if the original diameter of oil drain hole is M14 then operator needs a M15 tap 3. Use a tap wrench to enlarge the diameter of oil drain hole 4. Take a washer through the new drain plug and then insert a new oil drain plug Package list: 4 * TAPS: M13 * 1.5P, M15 * 1.5P, M17 * 1.5P, M20 * 1.5P 20 * OIL DRAIN PLUGS: M13 * 1.5 (5Pcs), M15 * 1.5 (5Pcs), M17 * 1.5 (5Pcs), M20 * 1.5 (5Pcs) 40 * COPPER WASHERS: 10 * M13, 10 * M15, 10 * M17, 10 * M20 1 * Storage Box .