[TheThinkTank] 19-32nds equals 15mm about

We have found that 19/32 american wrenches work great as 15mm wrenches. We bought 50 at a pawn shop for $5.

Used 30 to teach a whole 4th grade class how to remove and add pedals to crank arms.

19/32 equals 15.08mm to be more exact. The inferior metal ones will spread a little after awhile, so higher quality is the way to go.

If both ends are open ended, we bend a short spoke and tape it to one end for hanging on our tool board. We paint all tools to keep them around and for easy put back onto the 8 different colored boards.

Also, we cover the 19/32 part with masking tape, write 15mm on it, then cover that part with clear packing tape- lasts several months before a spruce up is needed.