1. Classic design2. Quick installation release device3. Powerful4. Wide range of application5. High quality metalInstructions For Use:These security guitar strap locks simple to put on and remove your strap - simply pull out the straplock button and slide to release/ install.Strap locks work perfectly for your electric guitar, bass and acoustic guitarsProduct name: electric guitar, acoustic guitar, classical guitar, bass strap button, guitar strap lockTypes of musical instrument accessories: Western stringed musical instrument accessoriesColour:BlackMaterial:Zinc AlloyPackage Contents:4 * Guitar Strap LockOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.