Trillenium Cartridge for New style Eclipse, Pinnacle, Curved & Rectangular lever sets. The Cartridge Replacement Kit with spring-loaded bushings (pair) is designed for replacing worn-out parts in locking systems. This high-quality kit ensures smooth operation and extended durability of your locks.
 
Handed: Yes, Viewed from INSIDE The House
if the hinges are on the Right, it is a Right Hand Cartridge

Screw Holes: 1-5/8 inch 

Contents: 1 Right Hand Bushing, 1 Left Hand Bushing

Note: You do NOT need both, however, these are sold in pairs to eliminate errors and to ensure that you receive what you need