Specification Brand : HARFINGTON BulletPoint1 : Size - Standard thread size: 1/4"-20; head diameter: 38mm / 1.5"; total thickness: 17mm / 0.67"; stepped part size: 20mm x 5.8mm / 0.79" x 0.23" (D*T); knob style: 6 star, Through Hole, brass insert; color: black BulletPoint2 : Material - Sturdy and durable plastic star knobs ensure durability and long-lasting performance. Brass metal screw-in female thread provides strength and corrosion resistance. Threaded knobs provides a smooth surface, comfortable grip and ergonomic operation BulletPoint3 : Features - Star design adjusts and tightens easily for maximum control and flexibility without the need for additional tools. Clamping knobs feature tightly-in metal insert (won't strip), making it easy to install and secure in place. Through hole female star handles allow for easy installation and removal, versatile mounting options. BulletPoint4 : Applications - Star knob handles are widely used in machinery, electronics, equipment, furniture and can be used on drill presses, lathes, routing jigs, fixtures, packaging and woodworking machinery, printing equipment. The threads are neat and clear, the force is even and deep, not easy to slip, and there are no burrs. BulletPoint5 : Note - Ensure that the knob is securely and properly installed on the corresponding male threaded component or fastener. Choose the star knob size that suits your needs. Do not over-tighten as this may cause damage of the knob or threaded parts. Color : Black ConnectorType : Crimp CustomerPackageType : Standard Packaging Department : Unisex-Adult DriveSystem : Star ExteriorFinish : Brass ExteriorFinish1 : Black ExteriorFinish2 : Brass ExternallyAssignedProductIdentifier1 : 662972281940 ExternallyAssignedProductIdentifier2 : 0662972281940 ExternallyAssignedProductIdentifier3 : 00662972281940 FinishType : Plated HandOrientation : Ambidextrous IncludedComponents : Non functioning Door knob and chosen longplate for both sides of door, two dummy spindles and mounting screws ItemName : HARFINGTON 4pcs Star Knobs 1/4-20 Female Thread 38mm Head Plastic Through Hole Brass Screw-in Clamping Handles Threaded Hand Knobs, Black ItemPackageDimensions_Height : 11.6 centimeters ItemPackageDimensions_Length : 2.1 centimeters ItemPackageDimensions_Width : 9.9 centimeters ItemPackageQuantity : 4 ItemShape : Rectangular ItemTypeKeyword : star-knobs LockType : Key Lock Manufacturer : HARFINGTON Material : Brass Material1 : Plastic Material2 : Brass MetalType : Brass MetalType1 : Bronze MetalType2 : Brass ModelName : 828194 ModelNumber : hta240108hh000308 NumberOfBoxes : 1 NumberOfItems : 1 PackageLevel : unit PartNumber : hta240108hh000308 ProductDescription : Star knobs are made from plastic material ensuring durability and long-lasting performance. Brass metal screw-in female thread provides strength and corrosion resistance for long service life. Sturdy and durable threaded knobs provides a smooth surface, comfortable grip and ergonomic operation for enhanced user control and ease of use. The star design adjusts and tightens easily for maximum control and flexibility without the need for additional tools. Clamping knobs feature tightly-in metal insert (won't strip) for a variety of threaded applications, making it easy to install and secure in place. Through hole female star handles allow for easy installation and removal, versatile mounting options. Star knob handles are widely used in machinery, electronics, equipment, furniture and can be used on drill presses, lathes, routing jigs, fixtures, packaging and woodworking machinery, printing equipment or anywhere an M4 female thread is required. The threads are neat and clear, the force is even and deep, not easy to slip, and there are no burrs. If you need the flexibility of easy installation and removal, choose a through-hole design. If direct mounting is preferred or space constraints exist, choose the non-through-hole design. Note: Ensure that the knob is securely and properly installed on the corresponding male threaded component or fastener. Choose the star knob size that suits your needs. Do not over-tighten as this may cause damage of the knob or threaded parts.