This is a spiral blades PDC hole opener, upper is 6 5/8 API reg box, bottom is 4 1/2 API reg box, drillers could fit PDC bits or motor applicable tricone bits in front.

The long PDC blades performs like a near-bit stabilizer and a reamer that keeps hole at straight trail and reams well-wall smoothly.

Solidkey also produces PDC hole opener for HDD/No-Dig application, please contact us to get more information.