The multi-functional woodworking guide is a modular portable universal guide, adapted for guiding multiple hand held power tools, that is extendable with the use of multiple guide plates, side bars and edge bars in order to increase the size of the guide device to any length, thus being capable of cutting, grooving or sanding an unlimited length of material with the use of side extension clamps. The temporary clamping structure for electronics is arranged such that the fitting pawl is unfixed from the fitting hole by bending the tip end of second protrusion of the electronic device body in the direction in which the second protrusion goes away from the first protrusion. Thus, to adjust the cloth diaper to a determined size, only each of the buckling parts of the adjusting unit is buckled and fixed onto the adjusting surface to form a cloth diaper the size of which is properly adjustable.