Sunex SX5203 1/4-Inch Mini Angle Die Grinder 20,000 max. RPM of quiet speed Only 82 dBA Weighs only 1.1-Pound Backed by a 1 year warranty Specificat ions: collet/pad size 1/4-Inch free speed 20,000 rpm, weight 1.1-Pound, length 6.1 -Inch ave air consumption 3 cfm, air inlet thread size 1/4-Inch npt, min hose size 3/8-Inch id, sound level 82 dba