5700 Series. Solid Carbide Single Edge O Flute Downcut Spiral router bit
These tools provide good clean cuts in hard plastics as well as aluminium, while allowing the choice of downward chip removal that can enhance surface finish and part hold-down. These tools are manufactured with a polished flute that allows the chip to cur / form better, reduces heat and adds lubricity without the use of coatings. Tools that have an "S" after the part number were manufactured with specific geometry for cutting softer plastics. H is for harder plastics. 'L' means left-hand rotation.