According to Canine Journal, the Nylabone Double Action Chew and the Kong Extreme interactive rubber dog toy are a few of the toughest toys for dogs, among several others. These toys are designed for the more aggressive chewers that would otherwise destroy a standard, run-of-the-mill dog toy.
The Nylabone Double Action Chew incorporates small, nub-like bristles on the surface that massage the gums for effortless plaque and tartar control. The Kong Extreme line of dog toys is a more chew-resistant variant of the Kong company's standard dog toys, usually allowing for insertion of a special treat inside and entertaining dogs for hours.
Canine Journal also recommends the Mammoth Flossy Chews 3-Knot Rope Tug as an excellent choice for an owner with several aggressive chewers who quickly destroy pull toys, and the West Paw Tough Tux Toy, a convenient and dishwasher-safe puzzle toy similar to the Kong brand.
Petco praises rubber toys in general for tough chewers, stating that other toy constructions, such as vinyl, fleece, cotton, plush or latex, won't last long in strong jaws. They also mention on their website that rubber toys such as Kong toys are for "the hard players" and are "the toughest in the toy category."