I don't even own a torque wrench, and I coped just fine all I have is the right sized double ended spanner. The actual key stays inserted in the bolt with out much effort, I only had to apply a little force to keep it in when inserting my seat post clamps (which are upside down). If I was going to take it out on the road a lot, which I don't because I haven't got them for my wheels yet, I might get another key, one in the house on in my bike bag, and thats just as easy as carrying around a set of Allen keys.
I don't even own a torque wrench, and I coped just fine all I have is the right sized double ended spanner. The actual key stays inserted in the bolt with out much effort, I only had to apply a little force to keep it in when inserting my seat post clamps (which are upside down). If I was going to take it out on the road a lot, which I don't because I haven't got them for my wheels yet, I might get another key, one in the house on in my bike bag, and thats just as easy as carrying around a set of Allen keys.