Virginia Abrasives Concrete Power Trowel Finish Blades 423 FB0614 6x14 Inch Universal Carbon Steel Manganese Slabs Walk Behind Ride On Machine Set Rentals drive the ground chisel tip drive the ground chisel tip directly over a supporting floor joist rather than between framing bays 00 in Length x 12 Flex Resistant Contour Edges: Specialized structural profile geometry increases blade stiffness to guarantee uniform surface leveling under load Diameter Trowel Structural Material Heavy Duty Manganese Carbon Steel Mounting System Universal Bolt Pattern Rivet Configuration Precision Countersunk Package Quantity 4 Blades per Box Hardware Included 4 Mounting Bolts Universal Product Code 00809916064409 Pro Tip: Clean the trowel arm assembly thoroughly before mounting new finishing blades