About ten years ago I read in “M-To” article that described the design of the spear gun. Decided using the same principle — a spring as a battery, to make the gun more simple, easy, and good combat. Numerous experiments and fine-tuning have produced the desired result.CAN OPENER-GREGORATOS
The knife, which I did, the commercially available and opens cans faster. Its basis was a steel tube and rod, a part of her. The end of the rod is bent, it is inserted, and then open curved steel pin. On one end of the tube brazed to the tool holder, mounted on the other Read more…










Not find, perhaps, a car or complicated mechanism which isn’t used ball bearings: they are embedded in devices and engines, airplanes, and tractors, bringing accuracy, reliability and durability. And suddenly — an unexpected metamorphosis: the ball turned into the destroyer, has become a cutting tool. The device, manufactured on its basis, can be used for cutting writing and photographic paper. 