Speeding up bruteforce cracking time

[slyexe]

Hello, im wondering if there is a way to use custom rules Or masks? 
Im trying to crack my talltalk router wifif password from the handshake.
I know my password is 8 charecters long and is a combination of 5 uppercase letters and 3 numbers.
I see in the bruteforce it is trying all hashes ,example- abcdefgh, jkmnpqrt.
Is there a way to make it only search with a max of 5 uppers and 3 numbers in any order
Example- A3B4CDE6, 9TA4VYQ6

If you want to limit your keyspace simply append a new custom charset using -1 to -4.
Check out the Wiki for more info
https://hashcat.net/wiki/doku.php?id=hashcat

So example would be say I have a password with only vowels and digits and one special character of ! which is in total 8 characters. I could create a custom mask by doing this:

hashcat -m 2500 -a 3 -1 aeiouAEIOU123456890! hash.txt ?1?1?1?1?1?1?1?1

Lets say you know the first 5 characters of the password are vowels and last 3 are digits only between 1-5 we can create 2 customs charsets to use.

hashcat -m 2500 -a 3 -1 aeiouAEIOU -2 12345 hash.txt ?1?1?1?1?1?2?2?2

Hope this helps and answers your question.