I have an old deflection beam Craftsman inch pound/newton meters torque wrench that I bought new in the late 1980s. Still works great in both directions and being able to see the torque increase before a "click" is nice too. Seems to work decent at low ranges, but the 5nm for some bolts is really too low to be in range unless you get a low range torque wrench.
The design has been copied by many since the 1980s, and this one at Park Tool is exactly like my Craftsman in every detail except for the branding.
https://www.parktool.com/product/torque-wrench-tw-2
While the deflection beam isn't versatile in blind situations like a click type is, it works great on bicycles and motorcycles. I can't think of a time working on a bicycle that I couldn't look directly at the torque wrench to read the scale.
Here's a modern version. 3/8" drive newton meters and inch pounds.
https://www.arestool.com/70213-3-8-i...-torque-wrench
Just to add another link -
https://www.parktool.com/blog/repair...s-and-concepts
But in reality, I don't really use a torque wrench on the low end bicycles I have. For small fasteners that say 5nm, I use two fingers placed near the bolt head for less leverage on a hex wrench, and on the higher rated torques I use all the leverage a wrench provides and put more effort into it. Not recommended, but I turn wrenches for a living on machines that come with no torque standards and you get used to feeling what amount of force will strip a particular bolt or nut that goes into a particular material.
If you're worried about fasteners coming loose while riding,
blue Loctite is your friend.
