Nice tool Abhijeet!!!!.... however I feel you could add a slot on the pointers to make the scale fit in..... I see the place where the scale fits is flat, so there could be problem that the scale might just slide out while the screws aren't tightened...... I hope I'm making sense.... I'm bad at explaining things....:-P

Pranav Panchal thanx for the advice. but i suppose u r late coz the competition has finished. :P
Moreover if i made a slot for the scale to fit in, it would be difficult to mark the zero reading. Also one of the pointer is fixed. so there should not be any chances of slipping.

Comment from Manolis Theofilos, a member of jury: Tools for making circles on metal exist, but tools that have their own scale do not. It can accelerate the job in the workshop and make the machinist's job easier.