I am a home remodeler and have had to install T-bars on new cabinets. After years of hand marking all the holes or making custom fixtures out of reclaimed wood, I finally decided to try an adjustable fixture. Most of these attachments are designed to use 5mm bits, so I ordered this bit to use with them. I don't need a lot of metric fittings, so being able to buy a cheap, quality fitting was perfect for me. Drill bits, mostly maple and a few MDF. The drill was straight, with a sharp point…