I would like to add that the "el cheepo" hand crimpers you get from many suppliers for dirt cheap often do a poor job of crimping.
Amp, Molex, and Waldom made good non-compound hand crimpers. I bought a compound crimper and the full die set from Philmore and have been quite satisfied with it.
There are other companies that make really good compound crimp tools. I also have a mil spec/aircraft grade with several dies that was my fiance's before she died. It was in the several hundred dollar range originally.
The crimper in the above picture is of the compound type.
Please be aware that there are different crimper types for many different types of crimp connectors also.
There is no such thing I have ever found that is a "One does it all" type, unless you get one of the replaceable die type crimpers, and even then, it may not do all types.
Amp has a special crimper for DB style connector pins, another for Cannon types, and yet (at least) a 3rd type cor spade and ring connectors. I have at least
6-8 different types, and still find myself lacking at times. Also the large battery lug crimpers for automotive use are a beast unto them selves. The "small" one I have has handles over 2' long and will do
[You must be registered and logged in to see this link.] battery cables only. Cost? AARGH!!! Close to 100.00 USD. They also make stand up die type crimpers that are 2-3 piece and are bench mounted. Some are even hydraulic operated. You don't even want to contemplate one of those unless you have VERY deep pockets. Then we get into the power line cable splice crimpers.......... $$$
[You must be [You must be registered and logged in to see this link.] and [You must be registered and logged in to see this link.] to see this image.] Pretty much the same is true for coax cable crimpers. The $2.99 ones are really worthless unless you are using the old, way outdated separate small ring RG 59 and 56 connectors. The newer coax connectors for RG 59 & 56 need a compound crimper for the ferrel, and some cable companies even use a special different style for their systems specific RG56 connectors.
They also make some for Heliax, RG11, and other commercial cables. Again $$$$.
So it's good to decide which type of connectors you are going to use, then buy a good quality tool for those types. An "el cheapo" may do for a very few crimps, but if you are intending to use it much, please buy a good one. It will pay for itself over the long run.
Personally, I have worn out 4-5 of the good compound crimpers for RG 56 and 59 coax, before I bought the replaceable die jaw type. And yes, I was in a commercial repair business situation. I needed to make up on the average from 1-
6 TV & satellite coax cables a day.
The cheapo compound crimpers start to wear quickly and they just don't do a good job. Some even from the start.