ESP STRAP LOCK is a strap lock that uses a nut that does not loosen due to collaboration between Nissai and ESP Co., Ltd. PLB v2 (PERFECT LOCK BOLT) technology with two different types of nuts in the thread pitch ensures that the nut locks the strap will not come loose during intense exercise or vibration. PLB uses 2 types of nuts in structure, but by modifying the design of the nut itself and adjusting the shape and size of each part, it is possible to use thick straps while reducing the overall height of the strap lock. The joints with the end pins will leave a lot of play and prevent damage to the guitar body. End pins and strap locks are small parts when viewed from the entire guitar, but they are very important parts to support the guitar. Manufactured in Japan to ensure high reliability and accuracy, and has passed strict strength tests. PERFECT LOCK BOLT is a registered trademark of Nisssey Co., Ltd. PLB v2, Patent No. 6224294, Ltd.