Integrity Glider Keeper - MINIMUM ORDER OF 6 Each 

Marvin's INTEGRITY Line .. all the ULTREX casement and swinging window parts, and swinging TRANSOM (IFSLT) Unit Parts. Free Part Identification and Help with Window Operators, Stationary, Picture and Transom windows, Parts Replacement Hardware, Vinyl Parts, Weather Strip, Complete Sash Replacements, Screens and Screen Parts, Roto−Gear Handles, Installation Guides, [PDF's] Installing Casement Operator Sashes, Removing and Replacing [PDF]

Marvin Window Sash Lock and Keeper Model 11869287( Bronze) Window Sash Lock. . 

BiltBest Window Parts - Double Hung Window Sash Lock

Double Hinge Sash Lock,  available in White, Goldtone or Dark Bronze.