Bill Purse – Tip 1 by Glen McCarthy | Feb 18, 2013 | Classroom, Education, News, Tips + Tricks | 0 comments Bill Purse – Tip 1 Tip 1 – You can usually tell the difference between nylon and steel string guitars by the way that strings are attached. Nylon strings are tied to the bridge, whereas steel strings are held to the bridge of the guitar with bridge pins.