I use Ernst gripper racks for all my wrenches. Save a lot of space. Plus I can just grab a set and go with them. They're durable and have a lifetime warranty. Plus I like that they're available is some many different sizes. I can have my ratcheting wrenches on one, flare nut wrenches on one, combination wrenches on one, and stubby wrenches on another one. All to fit the number of wrenches in the set. That way I'm not stuck with wasted spots not being used.
For guys looking for a set of rails for a shallower drawer Ernst also makes a low profile set of rails. I think they're supposed to be able to fit in a drawer just under 2" deep.
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