Apparatus, system, and method for catching a core

Blade edge structure for core drill

Blade edge structure for core drill

Connection for first and second members

Core barrel

Core barrel

Core bit

Core drill bit

Core drill bits with enclosed fluid slots

Core sampler

Core sampling drill

Cutter elements for hollow drill bit

Deep hole rock drill bit

Diamond tool for drilling and routing

Diamond-tipped core barrel and method of using same

Drill bit

Drill bit for jet assisted rotary drilling

Drill bits

Drill bits with enclosed fluid slots and internal flutes

Drill bits with enclosed slots