Prem Z3 Reg T27 Flap Disc, 4 1 2 in dia, 40 Grit, 7 8 Arbor, 13300 rpm no checkout retaining cap and nozzle retaining cap and nozzle Oversized ratchet with soft rubber grip allows for easy adjustment when wearing gloves Removable comfort cradle is a pivoting head pad that conforms to any head for the highest degree of comfort 3 position slider adjusts distance of the lens from your eyes for precise vision Crown strap adjustment allows the headgear to be raised or lowered for maximum comfort and performance Sweatband helps absorb perspiration and prevents sweat from interfering with vision and long life Recommended for aggressive use and heavy duty applications