Cornerstone Referral Code & Recommendation page. Welcome! Enjoy and share Cornerstone referral links on this page. Share all your referrals in your own free page. Fan of Cornerstone? Make sure you give a thumbs-up recommendation. Follow and influence friends & others. Cornerstone aims to provide the best possible shaving experience. Determined to turn an uncomfortable daily chore into a familiar, personal ritual that gets your morning off to a great start.