The bit is called a "spanner wrench" bit and if yours is like mine it is designed to fit in a hand crank drill called a "brace".
I'm interested in the answer to this being a torque nerd. Maybe we can get an answer
with or without washers. Are washers recommended? Drilling the holes is a great technique.
That probably works but with 2 issues.I never use the spanner tool, always a needle nose asking with a cres wrench fit as tight on the needle nose and as close to the rail bolt as I can.
It's rare that it slips out and great turning power with the added cres
Sent from my SCH-I500
I stand corrected. I've out of the hand tool business for over 12 years and my memory is about as long as my .It's amazing the different names that tools have. I was taught that this type of spanner was called a "face pin spanner". The one that looks like a set of dividers is an "adjustable face pin spanner". I know, I'm a tool name snob.
For what it's worth, if you guys use a 1/4" drill bit to clean up the bit holes on the bolts, it'll do wonders for your bit to take hold in the holes so bit won't keep slipping off when you're trying to tighten or loosen the bolts.