Some 40 days after United Automobile Workers walked off the job, picketing General Motors plants and grinding operations to a halt, the labor union’s members have ratified the tentative deal their representatives struck with the automaker earlier this month. The UAW announced the deal’s approval after voting ended Friday.

Employees will return to work as instructed by GM.

The contract was approved by 57.2%.

UAW Vice President Terry Dittes said the union is proud of the workers. “Their sacrifice and courageous stand addressed the two-tier wages structure and permanent temporary worker classification that has plagued working class Americans.”

The UAW says the contract includes an economic package of an $11,000 per member signing bonus, performance bonuses, two 3% annual raises and two 4% lump sum payments and holding the line on health care costs. But GM will close three U.S. factories.

The contract brings workers hired after 2007 up to the same wage as older workers in four years, and keeps worker health benefits with low premiums.