DEWALT Pegboard Battery Holder - 1 Inch (25.4mm) Pegboard
Changed the peg dimensions to better fit 1 inch pegboard. Peg spacing is now 25.4mm and Peg Diameter is now 5.8mm and still fits my pegboard with no movement. I used PrusaSlicer and split the model and add a tapered dovetail (see screenshot for settings). This was to increase the strength of the peg by reorienting them horizontally. The taper helps 4 peg side to hold down the 2 peg side. The whole thing is very stable once mounted to the pegboard.