Diablo's Sand Demon Double-Sided Reusable Hand Sanding Sheets with WEB-Flex technology offer professional users an innovative double-sided, ultra-flexible, and ultra-durable sanding sheet solution. These game changing sanding sheets elevate professional users from traditional 9x11 sanding sheets to a superior reusable sheet that combines the flexibility for contour sanding and the durability for thick stock or large area sanding. Thanks to each sheet's Film Core each sheet is equipped with a tear-resistant backbone, providing maximum durability and strength with no cracking. When combined with Clog-Shield, Diablo's own blend of grinding agents, the reusable sheets also reduce buildup and clogging on a wide variety of applications, including automotive, furniture making/restoration, cabinetry, 3D printing, model making, painted or stained banisters and balusters, and more.