Fitment: fit for heavy-duty axles with 11000 to 50000lb capacity (5 1/2 to 25 tons). The locking jaws can be adjusted to fit 3-5/8" to 6-1/2" OD bearing cups Features: 1) Designed to install wheel bearing cups in many heavy-duty axles, it is most versatile tool that can replace more than 30 individual drivers .