Feature●Slotted for use with Strap.●Knurled Bolt increases friction between Strap and Bolt Shaft for Greater Strength than a Smooth Bolts.●8 Bolts and Nuts per Pack.Description Mobile Home Anchor Bolt w/Nut ( 8-Pack) Knurled bolt increases friction between strap and bolt shaft for greater strength than a smooth bolts. Slotted for use with strap.