Strong and durable connectors are very important for the safe and proper functioning of a swing. Clevis connectors are ideal for the connecting purpose that gives utmost protection and long-lasting security. However, clevis connectors, which provide the tamper resistant link, need to be locked and unlocked by using the clevis key. These essential clevis keys are also known as SH-4 keys. Two types of clevis keys are available for opening the lock of clevis connectors such as SH-40 and SH-42. If you have purchased the clevis connectors for the best support of your kids while enjoying the swing, then you must purchase these required clevis keys as soon as possible!