Bosch SDP001 3-1/2 In. Delta Sanding Pad Allows sanding sheets to attach to Bosch Multi-X Oscillating Tool Award-winning pro interface: Oscillating Interface System (OIS) Accessory interface to the tool is the most important aspect to oscillating multi-tools For use with Bosch MX25 and PS50 tools along with brands that use the Bosch OIS system hook and loop, six holes Allows sanding sheets to attach to Bosch Multi-X Oscillating Tools. Accessory interface to the tool is the most important aspect to oscillating multi-tools. Bosch offers solutions for the best fit for today's high torque tools. For use with Bosch MX25 and PS50 tools along with brands that use the Bosch OIS system Hook and loop, 6 holes Made in Germany