Black & Decker SCS600 6.0-Amp Accu-Trak Saw with Smart Select Technology The Smart Select Dial adjusts saw settings between accurate straight cuts and intricate curved cuts Turn dial to extend straight cut guide which rides in the saw's cut line to help ensure accurate straight cuts Turn dial to retract the guide for easy handling curved cuts Dust blower keeps the cutline clear for better visibility The Smart Select Dial adjusts saw settings between accurate straight cuts and intricate curved cuts Turn dial to extend straight cut guide which rides in the saw's cut line to help ensure accurate straight cuts Turn dial to retract the guide for easy handling curved cuts Dust blower keeps the cutline clear for better visibility Tool free blade release for quick and easy blade changes