DEWALT DWE4887 1-1/2-Inch (40mm) Die Grinder 4.2 Amp, 25,000 rpm motor provides high power and speed for all 1-1/2" grinding applications AC/DC capacity works off welding machines and generators Paddle switch with lock-on button for easy gripping Precision 1/4" collet securely holds all proper accessories 4.2 Amp, 25,000 rpm motor provides high power and speed for all 1-1/2" grinding applications AC/DC capacity works off welding machines and generators Paddle switch with lock-on button for easy gripping Precision 1/4" collet securely holds all proper accessories (1/8" reducing sleeve as optional accessory)