2-3 Weeks. 45 Day Lowest Price - 100% Satisfaction Guarantee. The FR-50 SN is a part of the Fender Folk Music International Series, which includes banjos, mandolins, violins, and of course Resonators. It is a Square neck version of The FR-50, with many of the same features. Designed for lap steel, the FR-50 Square Neck is a great addition to any player's arsenal of guitars at an extremely low price.