DEWALT DW788 1.3 Amp 20-Inch Variable-Speed Scroll Saw Double parallel-link arm design dramatically reduces vibration and noise for extremely accurate cuts Exclusive tool-free blade clamps allow blade changes in seconds. Depth of Cut (inches): 2 in On-off switch, electronic variable speed, flexible dust blower, and blade-tensioning lever all located on front upper arm Arm design pivots from back of the saw to front, shortening the arm movement for smoother, quieter operation Arm lifts so blade can be easily threaded through the material for inside cuts