GATORBACK ( Button Drill Bit) SEISMIC BIT AVAILABLE SIZES: 3 5/8″ – 3 3/4″- 4″ IDEAL FOR: Seismic drilling for oil and gas Exploration, Potash and Geothermal. ONE STEP (RIPPER) SEISMIC BIT AVAILABLE SIZES: 3 5/8″ – 3 3/4″ – 4″ -4 1/4″ IDEAL FOR: Seismic drilling for oil and gas Exploration, Potash and Geothermal. CHEVRON SEISMIC BIT AVAILABLE SIZES: 3 5/8″ – 3 3/4″- 5″ IDEAL FOR: Seismic drilling for oil and gas Exploration, Potash and Geothermal. OUT-RIGGER SEISMIC BIT AVAILABLE SIZES: 3 5/8″ – 3 3/4″- 5″ Can be built to special order or oversized IDEAL FOR: Seismic drilling for oil and gas Exploration, Potash and Geothermal. Two-Way One Step Seismic Bit AVAILABLE SIZES: 3 5/8” – 3 3/4″ – 4” Can be built to special order or oversized IDEAL FOR: Seismic drilling for oil and gas Exploration, Potash and Geothermal. TWO-WAY THREE STEP SEISMIC BIT AVAILABLE SIZES: 3 5/8″ – 3 3/4″ – 4″-5″ Can be built to special order or oversized IDEAL FOR: Seismic drilling for oil and gas Exploration, Potash and Geothermal.