Josh Holbrook Flagstone Breaks Through with a Volvo Excavator & NPK Hammer

Josh Holbrook Flagstone attached an NPK GH7 hydraulic hammer to a Volvo EC160 crawler excavator to break rock in a stone quarry. "They are making a beautiful stand-up rock in Susquehanna County," said Drums Territory Sales Manager Ryan Whitmiller.

Purchasing Volvo excavators and NPK hydraulic hammers through Highway Equipment & Supply Co. gives you the perfect combination for any breaking, reduction, mining, excavation, or trenching project. Potential applications include:

  • Rock breaking

  • Slag breaking

  • Oversize material reduction

  • Concrete breaking & recycling

  • Road construction

  • Sidewalk & curb construction

  • Demolition

  • C&D recycling & sorting

  • Underwater applications

  • Site excavation

  • Scaling & tunnel excavation

  • Trenching

NPK is a world-leading manufacturer of hydraulic attachments. We are the ONLY authorized NPK dealer in central and northeastern Pennsylvania.

Bring your NPK hammer in for a certified rebuild, and you will receive a six-month warranty on all workmanship and materials. For more information, or to schedule service, contact your local service manager or product support representative.

4500 Paxton St.

Harrisburg, PA 17111

PH: 717-564-3031

FX: 717-564-3568


200 Burkholder Dr.

Ephrata, PA 17522

PH: 717-859-3132

FX: 717-859-2685



15 Honey Hole Rd.

Drums, PA 18222

PH: 570-788-1127

FX: 570-788-1593

Lock Haven

122 Fritz Rd.

Lock Haven, PA 17745

PH: 570-769-1070

FX: 570-769-1071