Life member Karen Jean Saverda of Fairbanks, Alaska, uses her chain saw a lot and likes to keep a few extra sharpened chains on hand. To help speed the process of sharpening all those chains, she devised this simple jig. Cut a kerf down the middle of the top and side edges of a 14-in. length of 2×6, and make the cut no greater than the depth of the chain’s teeth. Clamp the 2×6 in a bench vise; then simply lay the chain in the slot—the slot will keep the chain secure as you file the teeth.