Rixson top offset pivot guide. LOCKSMITH LOCK

Locate your bottom pivots with ease by dangling a plumb bob from the center of the top offset pivot.

Simply drops into the top pivot where you pull the bob string through and secure at the correct height by dropping in cone. 

Height adjustments are easy  

save yourself $70 and buy a high strength plastic one from me.  Plumb bob and line not supplied 

BUY HERE

https://www.ebay.com/itm/RIXSO...