The APS-438 Air-Powered Saw and FlexTrack system features track sections that can be attached to pilings and forms from 6 in. in diameter and up. The unit glides along the track on a trolley with four V-grooved stainless-steel roll guides to produce square cuts, while fully supporting the unit and minimizing operator fatigue. Cutting accuracy can be obtained up to ±1/16 in. with the 14-in. fiberglass reinforced abrasive blade when mounted to a smooth surface. Esco Tool. 800-343-6926.