Bosch 1-1/4" High Carbon Steel Plunge Cut Blade for Oscillating Multi-Tool is a tapered blade designed for greater precision, less vibration, and optimum debris removal. It is a bi-metal blade that can be used for wood, metal, and general purpose applications. It fits all professional multi-tools. Bosch Starlock oscillating multi-tool accessories deliver a 3-dimensional fit designed to provide a completely integrated system between multi-tool and accessory. This is a new dimension in torque for oscillating multi-tools. By using a 3-dimensional shape instead of a flat interface, Starlock provides the highest-torque transfer, reduced vibration, and the ability for higher performance applications. These accessories continue to be OIS compatible and fit existing tools, as well as the next generation of high-performance Starlock tools. Bosch multi-tool accessories are Swiss made for precision accuracy and long life in the most demanding professional applications.