• *Surf Fin Bolts Longboard Sliding Fin Screws Single Fin Nails Replacing Screws Made of 316 stainless steel,more to use.
• *Top head provide easy grip and comfortable rotation.
• *No tool required,just tighten by your hand.
• *Easily install your fins(not included) to the surfboard for smooth surfing.
• *Size: M4