Check the listing for details. Walter Valenite Vari-set RBN-140P STBC-12-2A. Condition: Used. Listed at 24.99 USD. This Walter Valenite Vari-set RBN-140P STBC-12-2A is a reliable and high-quality toolholder adapter for boring heads. It is made in the United States and comes from the trusted brand Valenite. This adapter is suitable for use in the CNC, metalworking, and manufacturing industries, making it a valuable addition to your workholding and toolholding collection. With its sturdy construction and precise design, this adapter can enhance your productivity and efficiency in machining operations. Its compatibility with the RBN-140P boring head makes it a versatile option for various drilling and boring applications. Invest in this Walter Valenite Vari-set adapter and take your machining operations to the next level. Feel free to check out my other great items for sale!