Home Amazon Goldbox deals Amazon: Helix 6-Inch 360 Degree Professional Protractor (12091) Amazon Goldbox deals Amazon: Helix 6-Inch 360 Degree Professional Protractor (12091) By ARCOM - 6 February 2017 325 0 SHARE Facebook Twitter Amazon Goldbox Deal: List Price: $10.60 Deal Price: $5.52 You Save: $5.08 (48%) Helix 6-Inch Professional Protractor 12091 Expires Feb 19, 2017