ROK Coffee. This manual coffee grinder by ROK is impeccably engineered, producing remarkably consistent grounds with the joy and reliability of a hands-on manual grind.. Made from a high-strength, die cast aluminium alloy and glass composite, with hardened steel conical burrs. 10 year warranty on metal parts, 2 year warranty on non-metal parts. Spare parts can be purchased outside of warranty for a reasonable cost.. Excellent grind control, adjustable from ultra coarse to ultra fine. Designed and engineered in London, Made in China. Long handle makes hand grinding much less strenuous. Capacity: 150 ml coffee beans. Dimensions: 12.2 x 8 x 10.5 in. Weight: 2.2 kg. ROK design and manufacture manually operated home coffee makers and grinders in London with sustainability, longevity, and excellent coffee in mind through every step of the process. They have perfected and honed their design over the years, winning prestigious design awards and even the ‘Best Product’ award at the London Coffee Festival in 2014.