Concerned mums and dads set the desired study time on the Study Ball and attach it to their child's ankle, reports the Daily Telegraph.
A red digital display counts down the 'Study Time Left' and the device beeps and unlocks when the time expires.
The prison-style device weighs 9.5 kg (21 pounds), making it difficult to move while wearing it.
It cannot be locked for more than four hours and comes with a safety key that allows the manacle to be opened at anytime.
The ball and chain costs £75 and is sold online at curiosite.com.
The website says: "Quite often, students who are having problems concentrating tend to get up every ten minutes to watch TV, talk on the phone, take something out of the fridge, and a long list of other distractions.
"Were they to dedicate all this wasted time to studying, they would optimise their performance and have more free time available."
Designer Emilio Alarcon said: "The project was born of a conversation I had with a friend who was studying for a civil service exam. He said: "I haven't left the house in a week, this is like being in jail"."