Mayes Branded Squangle by GreatNeck Tools.  Ten tools in one, incorporating all the features of a square, rafter square, protractor, level, t-square, sight plumb, straight edge, layout jig, pitch finder, ruler. 

• Rugged lightweight anodized aluminum alloy and plastic, easy-to-read settings and scales.
• Rules scribed in 1/16" and 1/12" along 13" body and 4-1/2" right angle as well as on 8-1/8" adjustable arm.
• Hip and valley pitch, rule and square measurements on front.
• Thumb-screws for angle adjustment 45 thru 90.
• Rafter scale for hip and valley or common types.
• Door sill/window sill pitch settings.
• Protractor setting 45 thru 90.
• Used by carpenters, plumbers, boat builders, truss makers, steel workers, DIY fans.
• Instruction book included
• Approx. size ~  Length: 13.50"  Width: 6.90" Height: 1.30" 
• Manufacturer's Warranty:  If for as long as you own this Mayes® product you find any defect in material or workmanship, through normal usage, send it to Mayes® for repair or replacement at their discretion.