1) Co:10-13%.. 2) Grain size: 0.5-0.6um 3) DIN or ANSI standard 4) ISO9001:2008 5) Coated or not coated... 1. Micrograin carbide rod: WC=90%, Co=10%, TRS>3800N/mm2; Hardness>91.8HRA, Grain size: 0.5,0.6,0.8um; High quality of wearability and impact 2. Made by world latest 5-AXIS CNC tools grinder, promise the quality and precision of cutter. .3. Super TiAlN, reduce the coeffiction of friction, ...