Hi Swisco-
First off, thanks for being the amazing window parts resource!
Hopefully you can help me here. I have a customer that is looking for a more safe and secure way for keeping their aluminum single hung lower storm sash up in the open position. The current keeper system is a thumb screw only on the right hand side of the sash. This is not adequate only being on one side. Ss this customer was closing the storm, it let go and came down on her fingers. Bare minimum I would like to add a second thumb screw keeper to the left side and if possible, I would like to find the general category for other types of storm window keeper hardware other than "slide bolts" so I can explore all the options before I have to tell them their due for new replacement storm windows. Can you help? I hope these pictures are not uploading upside down....they are oriented correctly on my end.
Thanks!
Stephen