We, PENTA established in 1997, are reliable company which manufacture and exports the equipment that have been developed and sustained with our know-how for foundation construction works and Drill Rig to overseas. Our main products are DTH hammer & Bits, PUD Under-reaming Drilling Bit system and more DTH related products. - PUD Under-reaming System is optimum under-reaming bit which allows boring and casing simultaneously at unstable stratum where strenuous to bore. (Size: PUD45 ~ 745) - PUD system offers the unique advantage of increased pace and stability by keeping Housing Bit and Wing bits horizontally through the drilling process and automatically extending and retracting make work more simple and effective. In addition, it’s specially design for easy removal attachment of parts. - PUDW System is overburden bit which allows additional extended reaming for more solidity and stability by boring two-level. - PW System is overburden bit that is able switch to general boring while boring extended reaming. Also, we manufacture Drill Rod, MACH reverse circulation cluster hammer, HHD horizontal drilling system as well.