STC has decades of experience in converting excavators into demolition machines. Our product range runs from straight booms to 3-4-piece demolition booms. HRD High reach demolition; for work at larger heights based on machines from 25- up to 125-tons. 3PC triple; A three-part front for working at medium heights with heavier tool weights, or for going into depth. Also suitable for clearing foundations and/or hammer work. SB Straight Boom; A boom so that the machine reaches a little more height, but also works better with the tool on the ground during crushing work.