Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number KLEI-52039 CN1972AR found under Gaff Set Tree Pole Climbers by Klein Tools Inc. The National Stock Number assigned to this part is 4240015577004, and the Federal Supply Class is 4240 Safety And Rescue Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like KLEI-52039 CN1972AR.