Grids Infrastructure is a leading Core barrel manufacturers & suppliers in india, With Manufacturer in chennai India, which is known for its quality and long lasting Core Barrel. Whatever your needs may be, we can deliver the highest-quality instruments in the allotted time. When standard twist drills are less effective, core barrels are used, or for hard rock drilling, they are used in conjunction with tapered rock augers. The Core Barrel is designed with a narrow front to increase penetration rate by cutting and expelling less contact surface zone.