This ground throw has operating low level target and numbers for the target. Sprung ground throws are designed to be connected directly to the turnout taking advantage of the internal stainless steel springs.
 
Sprung ground throws (Series 200S) feature two internal stainless steel springs to take up the overtravel and maintain tension upon switchpoints against the turnout stock rail.  The springs are preloaded to a 6-ounce force, assisting in good electrical contact between points and stock rail and aiding in turnout installation.