Specification Brand : Garosa BulletPoint1 : Centre Finder: Used to scribe the centre of the circular plate and the shaft, making the measuring much easier. BulletPoint2 : Measure Range: With 100mm scale on the body as well as standard 45° and 90°, the ruler has wide measurement range. BulletPoint3 : High Accuracy: Ensuring high accuracy, this centre finding gauge will largely improve your working efficiency. BulletPoint4 : Good Material: Adopting premium aluminum alloy material, not easy to deform, has great durability for long use. BulletPoint5 : Easy to Carry: Light in weight and compact in size, the center gauge tool is very convenient for daily carrying. ItemName : Center Finder, 45 90 Degree Angle Line Gauge Carpenter Ruler Aluminum Alloy Inch Woodworking Center Scriber Wood Measuring Scribe Tool ItemPackageDimensions_Height : 16.1 centimeters ItemPackageDimensions_Length : 1.4 centimeters ItemPackageDimensions_Width : 8.4 centimeters ItemTypeKeyword : carpentry-squares Manufacturer : Garosa Material : Metal ModelName : Garosa6zb9fdwic1 ModelNumber : Garosa6zb9fdwic1 NumberOfItems : 1 PartNumber : Garosa6zb9fdwic1 ProductDescription : Specification: Item Type: Center Gauge Material: Aluminum Alloy Measurement Range: Approx. 100mm / 3.94in Minimum Scale: 1mm Use: For woodworking measurement. Function: Draw the center line of a circle, find the center of a circle, draw a 45° line, and draw a vertical line.