https://www.andersonpower.com/content/dam/app/ecommerce/product-pdfs/DS-PP1545.pdf

anderson powerpole 35/45a shell punch

8.4 x 16.3 mm / 0.33 x 0.64 in (per spec)  



9 x 17 mm ok
10 mm is too big

5/16 (10/32)" = 7.9mm
11/32" ~= 8.7mm (ideal)

official anderson colors:
Red Green Black White Blue Yellow Orange Gray Brown Pink Purple

8.5 x 16.5 mm for ch-25 (I see you have that die for ch-60)

vevor  855-385-1880
CH-60 die in VEVOR Hydraulic Hole Punching Machine CH-25

the other option:
ANBULL Hydraulic Knockout Punch Set