BEST Keys are the world's best system for tensioning your canvas. Installed on all 4 corners of the backside of your canvas, BEST Keys will make your canvas tight as a drum with the simple turning of the nuts with a wrench. Simply tighten each corner a bit, alternating back and forth, and continue until you are satisfied with the tension on the canvas. BEST Keys act to evenly expand the stretcher joint which in turn tightens the canvas surface. This simple innovation can saves hours and the cost of having your artwork restretched. Wrinkles disappear with just a few moments work. We recommend BEST keys be installed on all canvases to make sure your artwork's presentation remains wrinkle free during its long life.

Save hours and preserve your canvas by not restretching. Canvas tightens in moments using a simple wrench (not provided). Packs of 4 attached one to each frame corner with screws provided. Ideal for tightening any canvas, old or new.

Date First Available: April 22, 2011. Manufacturer: Jack Richeson & Co., Inc. Item Weight: 7.5 ounces. Is Discontinued By Manufacturer: No. Best Sellers Rank: #69,932 in Arts, Crafts & Sewing. Customer Reviews: 4.8 out of 5 stars 36 ratings 4.8 out of 5 stars. : B004XMCKAY. Item model number: 890048. Product Dimensions: 4 x 4 x 0.25 inches.