Galvanox Multi-tool Bit Driver Extender - Compatible with Leatherman Skeletool/Surge/MUT/Wave Plus and Signal Bits set, Multitool Kit add-on accessory (420 Stainless Steel) - Amazon.com
LEATHERMAN - Bit Driver Extender Add-on Accessory for Multitools, Silver - Walmart.com
Leatherman Bit Driver Extension Black Oxide at Swiss Knife Shop