Included - offer 80#: 30pcs large circle + 30pcs medium circle + 30pcs small circle, 120#: 40pcs large circle + 40pcs medium circle + 40pcs small circle, 240#: 30pcs large sanding circle + 30pcs medium circle + 30pc small circle, matching 6pcs drum sanding circle, wrench X 1, perfectly meet your various needs Easy to install - make sure the drum is well tight, the drum mandrel is equipped with a self-expanding rubber mat that holds the sand band firmly close to the mandrel for a better finish; Note: Splash particles may appear when the sand drum rotates at high speed. Wear professional safety glasses to protect your eyes Wide compatibility - these standards and widely used on smooth surfaces and concave edges, perfectly suitable for hard and soft polishing materials to enhance artwork home, wood products and other DIY decoration workers and labor Note: The data is manual measurement, please allow 1-10cm error, due to the differences between light and screen, there will be a certain color difference, the specific received in kind prevail.