GemRed Digital Protractor & Digital Angle Gauge - - Amazon.com
General Tools T-Bevel Gauge & Protractor #828 - Digital Angle Finder with Full LCD Display & 8" Stainless Steel Blade - Digital Protractor - Amazon .com
Amazon.com: 18 PC Stainless Steel Angle Gage Gauge Set Range: 5-90 Degree Machinist Tool : Industrial & Scientific