4" and 4.5" Hole Router Templates
thingiverse
I needed to cut 4" holes for speakers and 4.5" holes for 120mm fans as part of my virtual pinball cabinet project: http://lilmikey.com/2017/02/16/virtual-pinball-cabinet/ These templates were far more economical than a hole cutting jig as long as you have a template bit. Print Settings Printer: FT-5 Rafts: No Supports: No Notes: Easy to print in any material
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