Features and Benefits:�Use for making fast, repeat angle cuts on rafters and stairs�Material is made of solid brass�Thumbscrews are easy to grip�Attaches to any Empire framing square or rafter squareThe Empire 105 brass stair gauges feature solid brass construction with sure-grip thumb screws for easy tightening. The 105 brass stair gauges attach to any Empire framing or rafter square for making fast, repeat angle cuts on rafters and stair stringers.