The BSD (Big solenoid) head allows for deep marking of mild & high tensile steels. Heavy duty and hard hitting, the BSD will produce an excellent continuous mark – just like a high quality metal stamp. The MB8020 + BSD is a popular choice for many of our customers, as it gives them enough marking area, great flexibility and its easy to mount on a custom bracket or to the Markinbox post. The MB1010 & MB2015 with BSD are perfect for quick stamping larger parts with a deep, accurate and consistent mark. Safe to use and near to no consumables. A great choice for speeding up your process times of hard metal parts.