Don't know anything about your brand but the 1/2f 3/8m is common for tools used in transmission R/R. Most are much longer 36" average. They make getting top bell bolts that a 1/2 swivel is to big to get into. 3/8 swivel and able to use a 1/2 ratchet/breaker bar for more leverage.
we use APEX stuff a lot in aviation i have a few of those my self. they make all kids of cool stuff, ck brown tool supply, and the yard store. google they should come up.