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521 V2 Mini Tab by Coil Master

The Coil Master 521 mini V2 tab is a multi-functional device suited for anyone utilising rebuildable tanks. (RTA or RDA) Featuring a spring loaded 510 thread this device provides a secure and safe working platform while remains compact and easy to transport.

The addition of a 521-mini tab to any existing tool kit will soon come to be an integral part. Designed to assist with general maintenance and the technical advanced practices associated with rebuildable tanks.

Powered by a single external 18650 battery (not included) this device can be used as an ohm meter or to check voltage drop. Capable of measuring resistance down to 0.05 ohms it can also dry fire coils to a resistance of 0.1 ohms.

The included safety features of reverse battery protection and short circuit protection ensure everyone’s safety.


  • Ohm Meter
  • Coil Rebuilding Deck / Platform
  • Dry Coil Burning
  • Reverse Battery Protection
  • Short Circuit Protection
  • Battery Output / Voltage Testing
  • PCB Heat Protection


  • Resistance Measuring: 0.05 – 9.9 ohm (Error ± 0.05 ohm)
  • Resistance Rate: 0.1 ohm
  • 510 Thread with Spring Loaded Pin Connection
  • Powered Single 18650 Battery (Battery is not included)
  • Dimension: 80 mm x 80 mm x 28 mm
  • Weight: 80 g
  • Housing Material: ABS
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