Zenport Pruner Blade Rivet QZ407-P4 Cutting Blade Rivet. Requires riveting. Used to replace the cutting blade pins if the pins are lost or damaged. Used with Zenport QZ407 QZ408 QZ409 Professional Pruners. These classic pruners have 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. Pruner is 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.