Specifications Material Anodized aluminum alloyAdjustable length 26 4 135 38 cm 10 4 53 3 inches Components thickness 0 16 inchesRotatable scale range 360° rotation adjustable from 0 5 inches strokeIndividual rod lengths A 18 inches B 12 inches C 8 inches Features 1 Anodized Aluminum Construction Crafted from high quality aluminum alloy to ensure reliability and professional performance 2 Laser Etched Scale Features clear markings for accurate and efficient measurements in stairmaking projects 3 Ergonomic Knob Design Simple to use knobs for precise adjustment without tools for enhanced convenience 4 Adjustable Length Flexible connection design allows adjustments between 10 4 53 3 inches to meet diverse project needs 5 360° Rotating Arms Includes rotatable parts for versatile application and precise stair layout creation Package Included 1 x Carrying Bag5 x Measuring Rods2 x Fixed 12 Rotatable Arms1 x Accessories Kit