CNBTR Black Zinc Alloy Female Thread Metal Machine Fixing Knob Adjustable Clamping Handle Pack of 2 (M12) Special Zinc Alloy material, high impact, anti-acid, anti-oil. With innerspring, the handle has the small tooth structure. Thread Size: M12 ; Size: 43.3x110mm / 1.70x4.33'' (LxW) Thread Type: Female ; Package Include: 2 x Female Thread Adjustable Handles This handle is particular for the lever turning angle is limited, mainly used to adjust position and height of mechanical operating parts.