Review on 🔧 Enhance Efficiency with Drill America DWRRB13 Qualtech High Speed Drill Bits by James Wiley

When reaming screw holes, it is common to use a reamer that is 1/16" larger than the screw size, so this 9/16 reamer is for 1/2" screws. I have several of these reamers and all the others are the correct size hex so you can use the same head as the screw the reamer is intended for. For 1/2" screws, this would be 3/4" or 7/8". This reamer fits into a 1" socket.