Zenport Pruner Key QZ402-P4 Replacement QZ4 Series Pruner Adjustment Key for Zenport QZ4 Series Classic Professional Pruners. Zenport QZ4 Manual Pruning Shears has a comfortable, light, sturdy handle made of forged aluminum. The blade is made of high-quality hardened steel, which allows clean, precise cuts. The sap groove prevents the blade sticking when cutting “sappy” wood. It saves time and makes pruning easier by removing sap and debris after each cut. These Classic Pruners are easily adjustable. Hand and wrist protection and optimization of the force exerted are provided by the angled head, the ideal shape of the handles, and the cushion-shock absorber – non-slip coating.