Specification Brand : Dreneco BulletPoint1 : Star head is made of high quality plastic, good toughness and impact resistance, and durable. BulletPoint2 : Screws are made of carbon steel, corrosion resistant, high hardness, rust-proof, sturdy and durable. BulletPoint3 : Large plastic knurled handle for comfortable grip, fully threaded screw on type design for easily installing, removing and adjusting. BulletPoint4 : These thumb screws are widely used for mechanical equipments, electronic equipment, communications equipment, hardware, furniture decoration and other related industries. BulletPoint5 : Package includes: M4×8mm,10 pcs Color : Black DriveSystem : Torx ExteriorFinish : Zinc ItemName : Dreneco Thumb Screws Bolts Star Head Bakelite Grip Knobs Torx Handle Screws, M4×8mm,10 pcs ItemPackageDimensions_Height : 2 centimeters ItemPackageDimensions_Length : 10 centimeters ItemPackageDimensions_Width : 8 centimeters ItemPackageQuantity : 10 ItemTypeKeyword : thumb-screws Manufacturer : Ruiren Material1 : Plastic Material2 : Carbon Steel MeasurementSystem : Metric MetalType : Carbon Steel ModelNumber : M4x8mm, 10 stks NumberOfItems : 10 PartNumber : S10100651a01 ProductDescription : Product Name : Six Star Knob.