The Empire True Blue Laser Etched 12 in. Rafter Square (e3992) features permanent laser markings for superior readability in any light condition. SCRIBE-GUIDE precision scribe notches allow users to easily mark parallel lines on lumber. Hi-visibility laser etched markings won't fade after heavy use on multiple job sites. The rafter layout square is made from a durable anodized aluminum that is more durable than diecast and will not rust or corrode after exposure to the harsh job site elements. The Empire rafter square features conversion tables for common applications. The square features an increased heel width that is up to 15% wider than leading competitors giving users increased stability on all job site material. Features:SCRIBE-GUIDE precision scribe notches15% wider heel for a secure hold on all jobsite materialAnodized aluminum will not rust or corrodeExtruded aluminum more durable than diecastConversion tables for common application needsLink to rafter square manualLink to rafter square manualLimited lifetime warrantyIncludes: one E3992 12 in. TRUE BLUE Hi-Vis rafter square with manual WARNING: Cancer & Reproductive harm www.P65Warnings.ca.gov