Features:This strap locks are made of qualified silica gel, high strength with good tenacity, ensures a long time service.Work with most strap buttons. it can prevent your guitar strap from falling off.Easily slip over strap buttons. No need to remove or replace existing strap buttons on your guitar. Easy to install. Lock your strap in seconds. Nothing mechanical to break or wear out. Don't need to buy a special connector for each strap and guitar.Great accessory for acoustic guitar and electric bass.Specifications:Condition: 100% Brand New and High QualityMaterial: Silica GelColor: White + Black + Red + BlueOuter Diameter: Approx. 25mm / 1inchInner Diameter: Approx. 9mm / 0.3inchThickness: 2.9mm / 0.1inchQuantity: 4 Pair (8 Pieces)Weight: Approx. 13gPackage Included:4 x Pair of Strap Locks