Thanks, Kubihibi! Actually, I do have regular allen wrenches, but I also have some of those removeable screwdriver-type bits in allen form. I was wondering if something was made for a torque wrench that held those bits.
What I actually need, however, is what you pictured. I didn't even know it existed. I'm going to pick some up.
In the meantime, I just rode over to my dealer and asked the mechanic to tighten the 4 bolts for me.
Thanks!