1、CORROSION RESISTANT MATERIAL: The body of T square ruler is CNC finished aluminum alloy, surface after anodized treatment, rust and corrosion resistant and durable 2、ACCURATE MEASUREMENT: The carpenter work ruler come with accurate metric imperial double scale for easy reading to facilitate woodworking 3、MULTI ANGLE MEASUREMENT: The T square ruler protractor is simple and practical, suitable for multi angle marking, parallel marking and other work scenarios 4、SAVE TIME AND EFFORT: Crafting T square ruler feature adjustable angle markers that increase accuracy and save measurement time by moving and rotating the adjustable angle indicator to set any angle from 15° to 90° 5、WITH PENCIL: Carpenter work ruler come with a mechanical pencil, can be used for line drawing, measurement, practical and useful