The Legendary Subzero Mod is constructed out of solid C145 copper for maximum conductivity, sporting a much higher conductivity than other materials such as stainless steel or brass. All of contacts in the mod, from positive and negative contacts to the 510 positive pin, are fully adjustable, made of solid copper and plated with silver for maximum conduction efficiency. The Legendary also uses a patent pending 8-point clutch contact design in the switch, ensuring a solid and secure connection to your battery with minimal voltage drop, no matter how you fire the switch. However, don't be afraid to set this device down: the extremely innovative and downright entertaining locking ring freely rotates 360°, with an audible and tactile click differentiating between a locked and unlocked switch.