Evertites are the new sensation for canvas workers. These wooden stretcher bars have a built in mechanism on all four corners that enables you to adjust the tension without removal of your canvas. The manufacturers of these bars have also added mid-point lines on the tops of the bars to help you successfully attach your canvas. You will need a T-tool for adjusting the tension. The bars are made of very durable wood and will last for years. Be sure to have an ample supply of the Grande tacks for attaching your canvas.