The JS-90 Joint Cleanout Saw is designed for joint cleanout, concrete sawing and trench cutting. The walk-behind unit helps control dust, thanks to a blade guard with upcut rotation. It uses dry diamond blades and features a 9-hp gas engine, which is mounted close to the operator to allow cutting to within 1¼ inches of walls. Maximum cutting depth is 3 inches. The saw cleans joints at a rate of 20 to 60 feet per minute.