uxcell M6x20mm Male Thread Screw on Plastic Star Head Clamping Knob Grip 6pcs Weight: 78g; Product Name: Star Head Knob Main Material: Plastic, Metal; Package Content: 6 x Star Head Knob Main Color: Black, Silver Tone; Thread Size: 6 x 20mm/ M6 x 0.8"(D*L) Star Head Dia: 25mm/ 1"; Total Height: 40mm/ 1.6" Head Shape: 5 Point Star; Thread Pitch: 1mm