Brush Knuckles

My latest invention is a innovation to the paintbrush this device allows the painter to tackle large projects without hand cramps (painters-Paw) and spreads paint further allowing for more control and pressure in application of paint or stain most useful with said large projects such as a house or deck.
This design accepts both a 3 and 4 inch brush with available positions at both perpendicular and right angles to the user. The ergonomic control of the finger holds resemble brass knuckles as alike brass knuckles they seem this force multiplier, however differs with just 3 finger holds giving the user more movement and articulation of the brush with less grip strength needed.
This is a work in progress both magnets and clamps retain the brush to the device.
however a universal friction fitment is desired.

This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/efWCDzfvBig