Gearbox tool for Land Rover with 1/2in square driver1、Ideal Application: The gearbox overdrive mainshaft nut tool is specially designed replacement for Land Rover Series with 600300 manufacturer part number. 2、Better Engagement: The tool is engineered to tighten the mainshaft nut at the end of the gearbox output shaft to a torsion of 85lbf.ft, which can ensure better engagement between the tool teeth and the spindle lock nut. 3、Professional Structure: The gearbox overdrive mainshaft nut tool is professionally designed with a 1/2in square driver which is a standard ratchet or torsion wrench for higher working efficiency. 4、Durable Material: Made of carbon steel and galvanized with tempered process to make sure high tensile strength and good ductility, excellent impact resistance and wear resistance. 5、Professional Production: Heavy duty gearbox mainshaft nut socket has undergone extensive quality and safety testing to ensure long service life and strong durability.