Bosch FSN SA Professional Guide Adaptor for guided straight cuts with jigsaws on guiderails. Jigsaws connect and release from guiderails tool-free, for easy and valuable time-saving work. For use with Bosch FSN as well as Mafell and Festool guiderail systems. Compatible with: GST 160 Professional, GST 140 Professional, GST 18V-LI Professional, GST 18V-LI S Professional, GST 18V-LI B Professional, GST 18V-155 Professional and GST 18V-125 Professional jigsaws.