GT10 Carbide tipped with full helix through to point. 2.5Ø minimum. GT50 Solid carbide dagger drill. Reduces delamination. Range 1.50Ø - 10Ø GT15 Solid carbide drill reamer. Range 3.3Ø - 16Ø GT38 Solid carbide rad. Point core drill, excellent cutting action. For opening holes free hand. Range 3.3Ø - 12Ø GT240 Solid carbide inverted point trepanning cutting action. Best controlled feed equipment Range 2.5Ø - 10Ø GT16 Solid carbide, two flute drills. 130° 4 face point GT39 Solid carbide tri flute drills. 150° x 30° helix GT105 Solid carbide. Double margin drills.