Hiblow

· The threaded portion has double-thread high and low ridges with a cut tip.
· Short sizes missing the thread at the underneck have 1, while long sizes have 2 "twisted knurls" made by rolling processing
· Holds onto the workpiece at the first strike just like a "universal screw", enabling stable and speedy fastening work
Also, by drilling a "clearance hole" for the friction generated when the unthreaded is screwed into the fitting material, the torque can be elevated.
· Although the head is flexible, the serrations (ribs) come closer to the outer periphery of the head than in the case of conventional flexible heads, enabling the head to fit well to the seat surface and provide a beautiful finish
· Wide size variation flexibly supports various thicknesses and lengths