Connect to spring and brush electrodes from other manufacturers — choose between PCWI, Tinker & Rasor, and 266 & 280 adaptors (adaptor not required for SPY electrodes)
PCWI Adaptors SKU: HHDPCWIADPT
Tinker & Rasor Adaptor SKU: HHDTRADPT
266 & 280 Adaptor SKU: HHD266ADPT