Review on LFA/Reichel Hardware 51412 All Steel Machinist Tap Wrench with Guide and Sliding Handle, 1/4-1/2-Inch by Reza Cook

Like a high quality collar. The nice thing is that it comes with a 1/2" (12.7mm) guide that you can insert into a drill press or route into a 1/2" chuck or collet to ensure the hole is square (Note: you are still turning over Do not turn the spindle while doing this. If you want to force tap threads, you will need a die head or similar and taps rated for force threading. Spiral point or spiral flute). I bought this when I just need to tap a few holes and don't feel like messing around with a die head or large holes that exceed the heavy threading capacity of my machine. It was great for that.