Zenport K888 Christmas Tree Nursery Shearing Knife, 16.25 Blade – 3 Pack. The Zenport K888 16.25-inch long Christmas tree and nursery shearing and shaping knife. 1-inch by 16.25-inch stainless steel cutting blade with a razor edge is lightweight and flexible. The 11-inch long handle is made of high-strength and lightweight hardwood that fits comfortable in the hand. The knife is designed to minimize wrist and forearm fatigue during heavy weight shearing of trees and bushes.