Advantage : Our drilling tools are designed to deliver high production footage at the lowest possible cost.Products are precision machined from high quality steel, then heat treated to insure streneth and durability.
Shank size is 22 x 108mm, and shank end drill rod end connect bit with thread way. Normally R22,R25,R32 for small hole. We manufacture shank end rods in the following threads: R22, R23, R25, R28, R32 mainly focus the stone quarrying such as granite, marble, limestone, sand stone quarries drilling, diameter of hole range from 38mm-50mm at most.