The VLRS is a repair sleeve for damaged PE pipe with the ability to accommodate gouges of any length.
Longer damages or gouges require multiple VLRS fittings.
In addition, it can be used as a coupling and repair patch for damaged PE pipe as long as the gouges are small in length.
The fittings allow repair without removing the damaged or defective section, whether it is a suspect butt fusion joint or a pipe gouge greater than 10% of the wall thickness.
Denny Tools (Denny Neubauer) of Des Moines, Iowa makes excellent knives and gouges, which are sold sharp.
This includes a book, a knife, a strop, two gouges, and wood cutouts including a small dog, a boot, and a three-piece nativity set.
These first three gouges are used a lot for the general shaping of projects, especially in larger sizes.
As you get deeper with the gouges, they gain in their versatility.