E. Emerson Tool Co. ZCPK3 All-In-One Contractor Series 3 Clamp Package VALUE SET - This value set includes three contractor-grade All-in-One Clamps (24, 36, 50) at one incredible price! STRAIGHT EDGE - E. Emersons Contractor Series self-clamping straight edge patented design has integral tubes running the length of the wide body construction, making it ultra rigid and light to handle. NO C-CLAMPING - No more C-clamping! Achieve that truly straight cut using this self-clamping straight edge to guide your tools. EXTRA WIDE - This self clamping straight edge is extra wide for exceptional rigidity and has a low profile for obstruction free cuts. CONTRACTOR SERIES - Please note: recessed tracks accept Contractor Series Saw Plate, Router Plate, and Stop Block. But it will not work with A, Twin, or Ultra Series accessories.