I am not excited as I hoped. They do not scale well between the three of them. The 1/2 is just as thick as my proto big dawg and my Armstrong 90 tooth round head if you do not count the selector on the round head.
The 3/8 drive has the most notable clicks and without having a better word is a but clunky in comparison to the 1/2 or 3/8. The 3/8 handle is to skinny for my hand and seems like I holding polished and chromed Rebar.
The 1/4 shines and is just as smooth as the proto 90t ratchets (htc series). Similar thickness too. I do not pay much mind to handles on 1/4 since they are generally lower torque fasteners.
I haven't tried any of the newer Asian 90t ratchets or even the 84t but beings how 3/8 is my most use drive and my Armstrong 88t is obsolete I wanted a newer high tooth count ratchet figured I would get all three.
Handle preference is personal. I prefer the thick big dawg handles the best but the big dawgs are also obsolete. The big dawgs have two knurled handle styles I prefer the smooth version.
Tool manufacturers seem to think my hand changes size if I use smaller fasteners. Screwdriver especially. I get smaller than 10mm or so may require small 1/4 ratchets which I don't mind being small. But 3/8 drive and 1/2 drive interchange quite a bit and length and stoutness of the head I would think would be more important than thickness of handle.
Bottom line is my personal initial opinion is the 1/2&1/4 ratchets shine. Although the 1/2 isn't what I would call low profile. The 1/2 drive fits my hand nearly perfect not as perfect as a 12-915 (dual pawl 90 click round head) but close. If I were blind I could tell the 1/4 and the 1/2 were same series of ratchets the 3/8 is odd somehow.
The biggest advantage that the lp90 series have is a detent in inside of the head that holds the selector in it's place no accidental reversing.
I here is a picture of my 1/4 ratchets mind you that my proto 4749p ( big dawg) has a 3/8 anvil.
The last picture compares a proto 5249xl 45t , Armstrong 11-992 88t , and the new sk lp90
I haven't measured the profile but the proto xl and the Armstrong maxx hold the lead for lowest profile in ratchets that I own. I do not yet own every ratchet ever made.


