PFX stands for fast chip evacuation in deeper holes. These drills are characterized by the fact that they are very well centered and can reach the maximum drilling depth in a borehole. So unloading (or peckering) is superfluous and even advisable. The A900 can drill up to 4x the nominal bore diameter at once. The PFX range has a very wide deployment.

Dormer Jobber Length Drill Bit, Heavy Duty, Series: A900, Imperial, 1/16 in Drill - Fraction, 0.0625 in Drill - Decimal Inch, 48 mm Overall Length, 6XD Cutting Depth, 2 Flutes, Quick-Spiral Flute, 22 mm Flute Length, 1/16 in Shank, Straight Shank, 130 deg Point, PFX Point, Right Hand Cutting Direction, HSS-E Cutting Edge, No Through Coolant, HSS-E, Bright, Applicable Materials: Magnetic Soft Steel, Structural Steel/Case Carburizing Steel, Plain Carbon Steel, Alloy Steel, Alloy Steel/Hardened and Tempered Steel, Free Machining, Austenitic and Ferritic+Austenitic, Martensitic Stainless Steel, Lamellar Graphite, Nodular Graphite/Malleable Cast Iron, Titanium Unalloyed, Titanium Alloyed, Copper, Brass, High Strength Bronze, Aluminum Magnesium Unalloyed, Aluminum Alloyed, Thermoplastics and Thermosetting Plastics

• Heavy duty parabolic flute design allows greater drilling depths in one pass
• Notched point improves chip formation
• Premium cobalt base material increases wear resistance
• Bright finish improves chip flow in soft or non-ferrous materials

• https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/Dormer_0046340_Catalog.pdf https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/Dormer_0046340_Catalog.pdf
• https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/Dormer_0052709_Specification_Sheet.pdf https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/Dormer_0052709_Specification_Sheet.pdf