The BlueSpot Tools Adjustable Grinder Pin Spanner is designed for use with locknuts on angle grinders. It is used for fitting or removing abrasive discs with its fully adjustable pin wrench and spanner handle. The pin distance can be set to 26mm, 30mm or 35mm, making it ideal for 4.5 inch, 5 inch, and 9 inch grinders. This spanner is a necessary tool for anyone working with angle grinders.