Abstract: An adjustable mounting bracket includes two frames juxtaposed to slide on each other and attached by nuts and bolts. Each of the two frames is essentially U-shaped with an internal T-shaped opening. The T-shaped opening is formed by a shoe plate formed between the end plate and two side plates. Slots and holes in the shoe plate are used to connect the two frames together and adjust the central working space for use with either a circular saw or a router. Slots in the shoe plate in conjunction with locking pieces are used to attach the power hand tool to the mounting bracket. The length of the mounting bracket is adjustable to be suitable for power hand tools such as a circular saw or a router that have different sizes. Consequently, the user only needs to use a single mounting bracket so material and cost are saved. Furthermore, the two frames of the present invention are identical so that the frames are easy to be manufactured.

Abstract: An improvement in the structure of a worktable for a wood carving machine includes a positioning device provided with a sleeve having a U-shaped recess at the top for mounting a supporting arm of a clamping device, the supporting arm being provided with an eccentric roller close to an intermediate portion thereof and adapted for sliding on the upper edge of the positioning device, and the clamping device being replaceable with a holder which can be moved up and down along a rod and rotated with respect to a cross-shaped sleeve for holding a workpiece in place.