What is this tool with the 2 wheels?

[u/Lechutehusky]

I literally don’t know what it is called or what it’s used for.

[u/FlishFlashman]

I think it's for fitting window screens. you use it to press in the rubber gasket-like thing into the channel at the edges of the frame.

[u/TheMartianDoge → u/FlishFlashman]

One side is used for cutting the screen to size, the opposite side to press it into the frame if I remember correctly from my one experience of making a screen 6 years ago...

[u/funkr3gulator → u/TheMartianDoge]

One side to set a crease in the screen one side to set the spine I think

[u/worf1973 → u/funkr3gulator]

It's a spline, and that tool I is called a spline tool.

[u/funkr3gulator → u/worf1973]

Ah yes didn't catch the auto correct

[u/FadeIntoReal → u/TheMartianDoge]

I have a few of these and neither end cuts. They’re two different sizes.

[u/Competitive-Basil188 → u/FlishFlashman]

Yep, this - I have one

[u/onomastics88 → u/FlishFlashman]

The rubber gasket is called spline, this is a spline tool.

[u/PomegranateOld7836 → u/FlishFlashman]

Screen rooms to push the spline into the track, in addition to windows.

[u/GuaranteeComfortable → u/FlishFlashman]

I owned one and that is exactly what it is.

[u/atribecalledcorey]

A spline roller

[u/KittyBungholeFire]

It's a double ended screen roller tool, aka a spline tool. One end has a concave wheel to mark and start the spline and the other end has a convex wheel to push the spline into the channel.

How to use

[u/dawlben → u/KittyBungholeFire]

I redid a screen with mostly cat proof stuff. It was annoying trying to cut it.

[u/IntrovertBiker → u/KittyBungholeFire]

Wait....is that backwards? More probable i have been using it backwards my whole life but if I remember right for me the concave was easier/better at setting the actual spline in the channel.

Not trying to argue, just trying to confirm

Yeah...the more I think a out it convex side makes the screen indent and concave side places....right?

[u/lonesomecowboynando → u/IntrovertBiker]

The concave end rides on the spline. It doesn't slip off that way.

[u/False_Economy3786 → u/lonesomecowboynando]

Definitely a spline roller

My father owned a remodeling business and we built storm and replacement windows, and full insect screens and sunscreens. One guy that worked for us could roll the screen out over the screen frame, take the roller to push the screen and spline in and, by angling the spline roller, trim the excess screen off the frame all in one motion. He was damn good.

[u/MesabiRanger]

Yup, spline tool. Had a neighbor’s dog that would jump thru our screen door to visit my dog. I got good with that spline tool. Darn dog’s name was Einstein!

[u/deltagrits]

Window screen thingy. FlishFlashman correct

[u/Rexrowland]

Its called a “spline roller”. It rills the spline into the channel in a window screen frame.

Source: windows contractor here

[u/907krak705]

These tools are usually a rolling tool that leaves a cut-line on a fabric or on a harder surface for borderlines , it depends on the markings on the roller-tool as to what use it has , I hope this gives some light on the tool

[u/point50tracer]

You use it to push the cord in around the edge of window screens.

[u/kensboro]

Not just for window screens... also used when making "Silk Screens" for screen printing (like T-shirts). A wood frame has a slot that goes around all 4 sides for a cotton rope. You lay the fabric across the frame, and use one of these to push the rope into the slot while tugging a bit on the fabric so you don't have it bunching up or warping; you need the screen fabric to be perfectly flat.

Once the rope is in, there's another tool that looks like a bit like a T-square you place in the slot / on the rope and hammer it down into the slot, so the fabric is stretched super tight; which gives you nice clean prints (hopefully).