Abstract: A dovetail jig has a frame with a plurality of longitudinally and axially positionable guide fingers mounted thereon each having straight and tapered guide surfaces used in forming dovetails and pins in respective workpieces. Spacers interlockingly fit in slots formed in the guide fingers to set spacing between adjacent guide fingers. A stop includes a first stop member having a first positioning surface positionable at a first location for positioning a first workpiece and a second stop member having a second positioning surface positionable at a second location for positioning a second workpiece. Preferably, the second stop member defines a hole in which the first stop member is received to mount the second stop member on the first stop member. A workpiece-securing mechanism includes a camming bar and an L-shaped clamp member which serves as a cover to prevent workpiece shavings from clogging the camming engagement between the two.