Compatible with Bosch PEX 300/400 AE Random Orbital Sander. The Hook and Loop feature provides an easy closure to remove the disc without using general force. Suitable for most random orbital sanders in woodworking, garages or industrial environments. The fast and durable oscillation speed operates at 12000 RPM and withstands high frequency for a uniform and consistent finish. It is not created or sold by Bosch, but it has the same performance as the original.