Overly complex (a theme you'll notice in my models…) holder for a Kurt vice handle.

Intended to use (4x) ½" diameter x 1/8" thick countersunk magnets, with (4x) M3x6 countersunk (flat head) bolts (threaded directly into the plastic; longer will be fine but stick out near your fingers).  Could also use the existing holes or the extra space to run screws directly into a wooden surface.

There's a pocket on the back meant for a piece of shelf liner or similar, to keep the holder from sliding on slick vertical surfaces - the attached .dxf is an outline of the shape.

Multiple versions uploaded - v0.002 is pictured, though v0.001 might be interesting to you as well.  I also made “simplified” (just the primary features but none of the chamfers/fillets) versions of v0.002 in .step and .stl, in case you want to edit the design without those features getting in the way.