The Adjustable Pin Spanner 15-52 x 4mm Black for Angle Grinder is a versatile tool designed for safely tightening or loosening the retaining nuts on angle grinders. With an adjustable range of 15mm to 52mm, it can accommodate various sizes of locking nuts commonly found on grinders. The 4mm pins ensure a secure fit into the holes on the nut, providing stability and control during operation. The black finish indicates durability and resistance to wear. This spanner is essential for maintenance tasks, allowing for easy disassembly or assembly of the angle grinder for blade changes or repairs.