The Apollo 851-561 PEX Clamp Tool is a crimping tool designed for working with PEX pipes ranging in size from 3/8" to 3/4". Manufactured by Apollo, this model is known for its quality and durability. Made in Vietnam, this tool is essential for securely attaching clamps to PEX pipes, ensuring a reliable and efficient plumbing system. With clamp sizes available in 3/4", 1/2", and 3/8", this tool is versatile and suitable for various plumbing projects.