Product details:

Drop, Aluminum, Kit - Weigh Safe trailer hitch ball mounts feature built-in scales to measure tongue weight and ensure safe towing. The dial gauge easily reads in increments from 0-1,500 lbs., with a green and red backdrop showing what is regarded as safe and dangerous weights. They're available in 4, 6, or 10 in. drops--with your choice of 2 in. or 2 1/2 in. receiver hitch attachments. The mounts are manufactured from 6061-T6 aluminum, include 2 in. and 2 5/16 in. stainless steel hitch balls, and are adjustable in 1 in. increments. Weigh Safe trailer hitch ball mounts are V5 and J684 certified, so you know they've been built with safety in mind.