The edges of the tool are turned up to prevent build-up on the tool

This combination blade is designed to fit 36-inch master power trowel machines

KO-20™ material is impact-resistant for extended wear

consistent finish as concrete firms up

Hydrazzo®

31" Heavy-Duty Stainless Steel Knee Boards (Pair) Edco Power Trowel Blades The edges of the tool31" x 8" Deluxe Polished Heavy Duty Stainless Steel Knee Boards are made of #16 gauge stainless steel. The 31" x 8" contoured sliders prevent digging into the concrete. Polished stainless steel reduces the risk of corrosive problems on these heavy duty kneeboards. These reinforced, durable sliders are easy to use to protect your concrete while finishing. Toe bracket secures the foot and allows for an ease of back and forth movement along the concrete