Ingersoll offers 3-Edged indexable deep hole drilling tools. The TPHT insert has three full cutting edges while the LPHT insert (for smaller diameter tools) has two full cutting edges. All inserts feature chip splitters and two unique chip breaker designs. The diameter range is .630" (16 mm) - 1.102" (28 mm) for BTA heads and .472" (12 mm) – 1.260" (32 mm) for MC and GD lines. These tools offer excellent diameter tolerance (IT10) and surface finish due to guide pad design. They double the high feed rate compared to conventional style gundrills, and no regrinding.