To prevent tampering with the circular saw (the lowering mechanism of the safety guard is often overridden), the machine can only be switched on with the aid of a sensor when the safety guard is closed (see red area at the end of the guard). Due to the design, around 25,000 active machines can be retrofitted with this safety device, which could prevent up to 500 accidents per year. The St p switch, which won the EURO-TEST PRIZE at the last BAUMA, is subsidized by BG Bau with EUR 150.00. The aim of the funding is to achieve a prompt and measurable reduction in cutting injuries in connection with circular construction saws.