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Pro series Mill Upgrades - If you're an existing customer with a larger 2" diameter roller series mill, and you want to upgrade to the new knob design, we can send you new design frames. Order knobs, and fasteners separately for a complete upgrade kit. For existing customers with a 2" diameter roller mill only, NOT for DIY projects. If you are willing to drill and tap two holes (1/4 - 20 threads) in your existing frames, we offer knobs by themselves and can supply you with a template to show you where to drill so you can upgrade your existing Pro frames to the new design.
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We currently ship within the US, with more countries coming soon.
Final cost and dates are confirmed at checkout.
🇺🇸 Ship from USA · On Agora since 2026
$26.00