Self-leveling to hold any guitar or bass! These self-leveling contoured wooden neck cradles are "the neatest neck rests I've seen," says repairman Dan Erlewine. Heavy-duty cork-lined Rock-n-Rollers hold any guitar or bass neck in position for inspection or for routine minor repairs. They're useful additions to any repair bench or music store countertop. Our Rock-n-Roller Neck Rests offer sturdy support for jobs such as: Restringing Adjustments Minor fret work Cleaning Nut slotting Many other common jobs This taller model (5" (127mm) height) is ideal for acoustic guitars.