A saw contains: a saw blade, a handle, and an auxiliary fixing device. The saw blade includes a serrated sawing section, a connection shaft, a fixing post defined between the connection shaft and the handle. The auxiliary fixing device includes two clamp extensions, wherein two front ends of the two clamp extensions are connected together by using a guiding section of the auxiliary fixing device. The auxiliary fixing device also includes two first elastic rings respectively rolled on two rear ends of the two clamp extensions, two second elastic rings individually formed in the two first elastic rings. Each second elastic ring is eccentric with each first elastic ring and its diameter is less than that of each first elastic ring, each second elastic ring is rotatably fitted with the connection shaft, and each first elastic ring abuts against the fixing post as not using the saw.

A saw contains: a saw blade, a handle, and an auxiliary fixing device. The saw blade includes a serrated sawing section, a connection shaft, a fixing post defined between the connection shaft and the handle. The auxiliary fixing device includes two clamp extensions, wherein two front ends of the two clamp extensions are connected together by using a guiding section of the auxiliary fixing device. The auxiliary fixing device also includes two first elastic rings respectively rolled on two rear ends of the two clamp extensions, two second elastic rings individually formed in the two first elastic rings. Each second elastic ring is eccentric with each first elastic ring and its diameter is less than that of each first elastic ring, each second elastic ring is rotatably fitted with the connection shaft, and each first elastic ring abuts against the fixing post as not using the saw.

A saw contains: a saw blade, a handle, and an auxiliary fixing device. The saw blade includes a serrated sawing section, a connection shaft, a fixing post defined between the connection shaft and the handle. The auxiliary fixing device includes two clamp extensions, wherein two front ends of the two clamp extensions are connected together by using a guiding section of the auxiliary fixing device. The auxiliary fixing device also includes two first elastic rings respectively rolled on two rear ends of the two clamp extensions, two second elastic rings individually formed in the two first elastic rings. Each second elastic ring is eccentric with each first elastic ring and its diameter is less than that of each first elastic ring, each second elastic ring is rotatably fitted with the connection shaft, and each first elastic ring abuts against the fixing post as not using the saw.

A guidance assembly for circular saws includes a monobloc structural unit that incorporates a first, discontinuous annular subassembly and a second, flat inverted at 90 degrees U-shape elongated frame subassembly. A pair of angle beams is spacedly adjustable that is positionally adaptable to support various bases of circular saws. The guidance assembly further includes a fence subassembly, placed beneath the monobloc structural unit, with which is interconnected and cooperates. To prepare the cutting operation, the blade angle of a circular saw is matched to the required angle by rotating first and second subassemblies relatively to fence subassembly. For cutting, a wooden board is placed under first and second subassemblies, so that, laterally, is positioned against a first and a second hollow bars of fence subassembly.

A guidance assembly for circular saws includes a monobloc structural unit that incorporates a first, discontinuous annular subassembly and a second, flat inverted at 90 degrees U-shape elongated frame subassembly. A pair of angle beams is spacedly adjustable that is positionally adaptable to support various bases of circular saws. The guidance assembly further includes a fence subassembly, placed beneath the monobloc structural unit, with which is interconnected and cooperates. To prepare the cutting operation, the blade angle of a circular saw is matched to the required angle by rotating first and second subassemblies relatively to fence subassembly. For cutting, a wooden board is placed under first and second subassemblies, so that, laterally, is positioned against a first and a second hollow bars of fence subassembly.