Specification Brand : HARFINGTON BulletPoint1 : Size - Standard thread size: M12 (1.75mm pitch); threaded stud length: 40mm / 1.57"; 6-star head size: 46mm x 28mm / 1.81" x 1.1"; step size: 24mm x 11mm / 0.94" x 0.43"; total length: 67mm / 2.64"; knob style: 6-star; color: black. BulletPoint2 : Material - 304 stainless steel stud on the clamping star knob has excellent corrosion resistance, oxidation resistance and high strength, ensuring durability and stability, preventing rust. PP plastic six-star handle knob is durable, and can withstand daily wear and tear, lightweight and easy to use. BulletPoint3 : Features - Hexagonal star-shaped design for easy grip, preventing slippage and ensuring stable operation. Combines screw-type structure and six-star handle design for convenient operation, enhancing user efficiency. Tightly-in metal insert is machine-injected at to securely connect the parts together. BulletPoint4 : Applications - Widely used in machinery, electronics, equipment, furniture, such as drill presses, lathes, routing jigs, fixtures, packaging and woodworking machinery, printing equipment. Sturdy thumb screws for the ultimate in adjusting and tightening control. Provide a smooth surface, comfortable grip and ergonomic operation. BulletPoint5 : Note - Ensure that replacement knobs are securely and properly installed on the corresponding female threaded component or fastener. Do not over-tighten as this may cause damage of the male thread knob. Choose the star knob size that suits your needs. Replace the knob if necessary. Color : Black ExteriorFinish : Zinc IncludedComponents1 : Knob IncludedComponents2 : Screw ItemName : HARFINGTON 4pcs Star Knobs M12 x 40mm 304 Stainless Steel Threaded Stud 46mm Plastic 6-Star Head Hand Tightening Thumb Screw Clamping Jig Knob Handle, Black ItemPackageDimensions_Height : 1.97 inches ItemPackageDimensions_Length : 5.12 inches ItemPackageDimensions_Width : 3.94 inches ItemPackageQuantity : 4 ItemTypeKeyword : star-knobs Manufacturer : HARFINGTON Material : 304 Stainless Steel, PP Plastic MetalType1 : Zinc MetalType2 : Carbon Steel MetalType3 : Alloy Steel ModelNumber : hta240725hh000202 NumberOfBoxes : 1 NumberOfItems : 2 PartNumber : hta240725hh000202 ProductDescription : 304 stainless steel stud on the clamping star knob has excellent corrosion resistance, oxidation resistance and high strength, ensuring durability and stability, preventing rust and providing reliable performance in various environments. PP plastic six-star handle knob is durable, and can withstand daily wear and tear, lightweight and easy to use. Hexagonal star-shaped design for easy grip, preventing slippage and ensuring stable operation. Combines screw-type structure and six-star handle design for convenient operation, enhancing user efficiency. Star design adjusts and tightens easily for maximum control and flexibility without the need for additional tools. Threaded knobs provide a smooth surface, comfortable grip and ergonomic operation. The tightly-in metal insert is machine-injected at high temperatures to securely connect the parts together. Threads are neat and clear, the force is even and deep, not easy to slip, and there are no burrs. Hand tightening knobs are widely used in machinery, electronics, equipment, furniture, such as drill presses, lathes, routing jigs, fixtures, packaging and woodworking machinery, printing equipment. Sturdy thumb screws for the ultimate in adjusting and tightening control. Ensure that replacement knobs are securely and properly installed on the corresponding female threaded component or fastener. Do not over-tighten as this may cause damage of the male thread knob.