Sometimes when plugging holes, holes finish up slightly oversized for the plug. These snug plug cutters overcome this by cutting a slightly tapered plug. The first 1/8” of the plug is the diameter stated whilst the remaining length is then flared out at an angle of 3°. Just tap the plug into place until you meet resistance then cut off the excess. Also, unlike regular plug cutters which have two cutting flutes, these plug cutters have four, giving a much cleaner cut and a smooth-sided plug which perfectly fits every time. For best results use in a drill press or power drill stand.