●Professional Tool: The spring ball plunger screw is made of stainless steel material, which can provides strength and offers good corrosion resistance in many circumstances ●Excellent Performance: The spring ball plunger is positioning ball is also called ball head plunger or spring plunger. a load device (slds) consisting of a shell, spring, ball or cylinder ●Excellent Performance: The ball plunger is widely used in some medical equipment, lubrication equipment, pneumatic tools and other products ●Flexible To Use: Engineers often use the stainless steel ball plunger in mold, fixture, assembly and other work ●Functions: The ball plunger set with the help of a certain pressure of the spring to promote the movement of the ball, so that the smooth operation of the equipment