Their initial research began in a shed with a lump of plasticine but has now been endorsed by a host of New Zea-land cricketers including Daniel Vettori, Scott Styris and current Scotland coach Grant Bradburn.
The product, which goes by the adult 'pure' or youth 'rock' brands, enables the bat to be gripped at the technically correct contact points which work as a gauge when setting up the stance. It has since been patented in most cricket-playing countries.
"If I could give young cricketers one gift from my career, it's to keep an open mind to new ways of doing things," said Hart, who kept wicket in 11 tests and two ODIs. "If I had access to this grip, it would have accelerated many years of hard work."
A key reason behind its creation was so batsmen can perfect a fundamental of the game before investing in equipment and coaching.
Richardson senior, a professional cricket coach, says that has compounding effects.
"Players with a correct grip are more likely to play the ball late and hit it cleanly," he said. "With the ultimate gripping surface, players don't have to think about their grip in the heat of competition."
The grips are expected to retail online for about $75.
