The rubber-like elastomer collar is lined with soft flanges that hug the shaft, accommodating a range of driver sizes. Available as a pair; the small fits 4.5mm to 6.0mm diameter shanks, and the large from 6.5mm to 8.0mm.
They are simple but highly effective. Made in Europe.
This product is not stocked at our retail stores, but can be ordered for pick-up.