I just went to the local hardware store and purchased a Craftsmen 10mm Allen Socket, Its a 3/8" drive.
At first I thought you were asking about the SST in 15 - d, this is what I used to do that step, a good friend made it. I took the time to upload the picture, so I will use it. hehehe
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Whats in the garage, well.... in the yard.
1986.5 Toyota Supra - NA - 5 spd
1986 Ford Ranger Lowrider - 5 spd
1984 Ford Ranger XLT - 7" Lift - 4X4 - Auto
"Stuck in the 80's"