Package Includes: 3 x Spline Socket Crank Handle ?This Casement Window Crank Handle only designed for window operators with 3/8-inch spindles. ? 1 x Tee Crank Casement Window Handle Kit (comes with plastic inserts to fit various spline diameters of 9/32 inch, 5/16 inch, 3/8 inch, 11/32 inch and 3/8 inch special. ) 1. Highly Compatible Casement Crank Window Handle: This innovative handle is specially designed for 3/8 inch spindles only. It offers superior compatibility with most older casement operators. Its vast adaptability distinguishes it as a premium choice among customers. 2. Durable Material: The 3 Pack Spline Socket Crank Handle and 1 Pack Universally Tee Crank Casement Window Handle Kit are constructed from durable die cast zinc. These handles come in a white painted finish that complements any window and can withstand regular usage without bending or breaking