Rakuda (Shimizu Seisakusho) Scaling Chisel for Electric Hammer Stored unused. There are personal notes etc. on the back of the box. Thank you for your understanding. The following is a copy and paste from the manufacturer, etc. It is a completely forged product made of structural alloy steel. It demonstrates powerful force in various excavations. It is heat-treated to a hardness of HRC57 and shot peened, so it has excellent durability. Applications: For demolition and chipping work. Tip width (mm): 75 Total length (mm): 320 Compatible models: Makita 8500N, Hitachi PH-40F, Ryobi CH-420A Hexagon side (mm): 17 Shank diameter (mm): 17 Shank shape: Hexagonal shaft