Window stopper - casement door lock

window stopper - sash blocker

with this simple object you can block one of the window sashes, preventing it from opening or slamming shut due to drafts

designed for square handles with a rounded base

if you have a casement window use the key and keep it locked

N.B. this type is not suitable for all types of handles and windows, before downloading and printing the part make sure it is suitable for your handle