Barry Shore: In the last year, millennials surpassed baby boomers as the nationâs largest living generation. They are also the most diverse generation to date, which is significantly impacting the world of philanthropy.
This is dictated by the difference in rod length. Because spey rods are longer, it is easier to cast further distances. Switch rods are better suited for nymphing than spey rods because of their shorter length and lighter weight makes them easier to stack mend line or highstick line.
These terms have given rise to abbreviations for the types of switch which are used in the electronics industry such as  single-pole, single-throw  (SPST) (the simplest type, on or off) or  single-pole, double-throw  (SPDT), connecting either of two terminals to the common terminal.