Switch On/Off, For Use With Angle Grinders, Circular Saws, Compatible with Manufacturer Part Number 1250DEVS, 1375-01, 1375A, 1380, 1500C, 1521, RFS1000, SM20, US40, Compatible with Grainger Part Number 19TT60, 24T736, 35KG83, 44H680, 44K153, 6YHT3