-Throop Rock Bit was established in Tonkawa, Oklahoma to service the oilfield and related industries as Maassen Tool & Supply (pictured)

- First manufactured our own line of steel tooth rotary drill bits

- First tungsten carbide insert bits manufactured

- Becomes the World's leading producer of small diameter rotary cone rock bits

- Production facilities expanded for the first time to allow for increased production and demand

- Company is renamed Throop Rock Bit in 1974

- Purchase our first CNC machine tool

- Move to new production facilities better suited to growing needs

- First sealed bearing bits manufactured

- Production facilities ar expanded to supply growing demands for production of Throop Rock Bits

- New office facilities are built for management personnel

- Production facilities and warehouse space expansion to increase production capacity

- Fixed Cutter series manufactured

- Sealed Journal series manufactured

- ISO certification

- Hardfacing facilities are expanded

- Completion series manufactured

- MTCI bits manufactured

- ISO 9001:2015 certification updated

- ISO 29001:2012 certified updated

- Production facilities expanded

- Upgrade to the latest CNC machinery in the market

- Celebrating more than 70 years of service