Lock device for hollow stem augers
Lockable drill steel and chuck assembly
Masonry drilling tool
Methods and apparatus for drilling subterranean wells
Mortar removal drill bit system
Mortar removal drill bit system
Multi-purpose drilling tool
Multi-purpose drilling tool
Planting system
Portable placer exploration and sampling apparatus
Profiled element for rotary drilling equipment and drill rod...
Profiled element for rotary drilling equipment and...
Releasable drill string stabilizer
Reversible power takeoff driven post hole digger
Rock drill
Rock drill
Rock drill with conveying groove
Rock drilling tool with improved conveying
Rotary gad for ground drill
Shank for a rotary/percussion tool