Forged head with heat treatment through induction of working surfaces (54 HRC). Finely polished working parts. Epoxy powder coating using an electrostatic process, followed by baking. Forged in a die and precision ground. Carefully hardened and properly tempered. Neatly painted and rust-protected through powder coating. The rail and pin are finely ground by hand. With a double-curved hickory handle and nickel-plated impact protection sleeve. Hickory handle: hardwood of high density, suitable for intensive or frequent use. The nozzle is produced by a hydraulic machine, a tension sensor measures the performance of the nozzle on each product, and then a pressure sensor controls the installation of the resin.