30 years ago I bought a similar lever made by VAR. it was a smaller lever and more flexible, but it does help with certain tire/rim combinations.

Ot is not so much just mounting the tire as it is protecting the tube from pinches by lifting the bead up and over.

I have a couple of older mtb’s and one is running a typical early 90’s road rim. Stuffing a 2.1 tire on a 13mm box rim is not an easy task. The KoolStop Tire Jack helps a lot.

I’m also running 25/32 tubes in 25mm tires. A lot of tube to negotiate the bead around.

I take the VAR with me on my road bike and a cut down KoolStop on my mtb.

John