NINDEJIN 98pcs Wing Nut assortment kit Wingnut butterfly nut drum bicycle1.[Wing nuts assorted]: wing nut or butterfly nut is a type of nut with two large metal "wings", one on each side, so it can be easily tightened and loosened by hand without tools; 2.[Quality]: made from 304 stainless steel, these nuts have good chemical resistance and may be mildly magnetic. The wings provide more leverage for greater torque while tightening than knurled head thumb nuts; 3.[Using]: Wing nuts are used when a part is often assembled