Feature： 【EXCELLENT MATERIAL】: The helicoil kit is made of steel, with better hardness and toughness after heat treatment. The thread inserts made of heat-treated steel has better toughness and is not easy to wear and deformation. Extended service life. 【HIGH PRECISION】: 135° apex angle of twist drills, with stronger metal penetration and higher efficiency. HSS screw taps have precise screw threads, offer large chip space and small resistance during cutting. .
