... penumatic sander which widely used for auto repair, Jeans grinding, stone grinding. Description: Taiwan Original Movement,Long Service Life Compact Structure ... it, Hard Torsion High Quality, Widely used on Auto-Repair, Stone Grinding, Jeans Grinding Specification: Speed: 25000rpm Chuck size: 6mm/3mm ... Penumatic Sander Air Sander Used For Jeans Grinding Auto Repair Stone Grinding