- Biswaroop Roy Chowdhury
- India New Delhi
The largest screwdriver is 2.27 m (89.2 in) long and has an acrylic handle which measures 24.13 cm (9.5 in) at its widest point and is 71.12 cm (28 in) long. The steel shaft is 8.89 cm (3.5 in) thick and projects a further 1.55 m (61.2 in). It was created by Biswaroop Roy Chowdhury (India) and was presented and measured in New Dheli, India, on 20 April 2011. The screwdriver was used to open up a screw which was fixed on a box which contained Mr Chowdhury's latest book.