DualSaw UGK155-O 6-1/8-Inch Upgrade Kit for BlackStar 115 Upgrade Kit can be used on the DualSaw QuadForce 115mm/4.5-inch Saw only 1-3/4-inch Cutting Depth Metallic Cutting Guard specially designed for dust evacuation Metallic protection guard with integrated lubricating system Increases cutting versatility so you can cut through thicker materials, such as lumber, plywood, hard and soft metals, and even plastics.