pin slotBall lock pins and slot pins are machine parts that make it easy to connect parts, simply by inserting the specially desned pin part. Convenient because no tools are required. Various types are available, such as a simple pin type; a knobIf I could find out how to properly use pin-in-slots, that'd save me the complexity of replacing them (which needs 5 more memberspins per slot). From what reading I could use a nylonnylatron