3M™ Hookit™ Flexible Abrasive Foam Discs are composed of a soft foam which conforms to irregular surfaces and is comfortable to use by hand. It can be used wet or dry and by hand or machine in blending applications. 3M™ Hookit™ Flexible Abrasive Foam Discs and Sheets have excellent dust and water control thanks to hundreds of laser-perforated holes ensuring a clean, dust-free working environment. These discs have excellent cut and finish.