Quick-change sanding, surface-conditioning, and flap discs have an integrated attachment point that provides tool-free disc changes to minimize downtime and increase productivity. They attach to a compatible holder on a die grinder or disc sander. Quick-change sanding discs use a coated abrasive for smoothing metal and wood surfaces. Quick-change surface-conditioning discs are made of nonwoven material for preparing metal surfaces for finishing. Quick-change flap discs have overlapping abrasive flaps for blending, cleaning, and deburring metal.