The Shark 3500 belt-drive is targeted to the contractor and heavy users. These machines are designed for long running times and in-field use. Furthermore, the front and rear handles make loading easy and convenient. The Shark BG is the tough, workhorse model of Shark’s rugged, belt-drive, cold water pressure washer line. Powered by industrial-grade Honda gas engines, all five models are certified to the rigid UL-1776 safety standards for pressure washers.