Flat-Faced. A lightweight sanding block with a firm-but-flexible backing which helps easily restore contours and body lines. When used with a vacuum system and compatible abrasives, helps capture dust which can increase abrasive life while helping reduce dust in the shop environment. The 3M HookitT hook and loop attachment system allows for easy abrasive changeouts. The built-in vacuum control allows the operator to adjust suction to prevent the block from sticking to the substrate while maximizing dust capture. Kit includes: (1) 5-1/4″ Sanding Block (1) 7″ Sanding Block (1) 10-3/4″ Sanding Block