Perfect size drill bit for the plugs we sell and most other standard sized plugs. Our plugs and bits are cheaper than most other sellers.
 
These are approx 8.5mm wide and 1 inch deep with a stop collar for perfect depth and speed. These fit in a drill chuck, not a quick attach. They have three flat sides to help prevent spinning in the chuck.
 
 Also available in five packs for more saving! Free shipping as all my other listings!