Indexing plungers are used in machine and fixture applications to lock items in place, especially when indexing a range of motion or a series of positions. A typical indexing plunger features a knob or ring attached to a spring loaded pin. When the knob is pulled, the pin is retracted, allowing for free movement. Upon release, the spring causes the pin to return to its extended position, locking the mechanism in place. KIPP Inc. offers a broad range of indexing plungers, including options in inch and metric, steel and stainless steel.