uxcell M8x15mm Male Thread Plastic Star Shaped Head Clamping Knob Grip 5 Pcs Weight: 144g; Product Name: Star Head Knob Main Material: Plastic, Metal; Package Content: 5 x Star Head Knob Main Color: Black, Silver Tone; Thread Size: 8 x 15mm/ M8 x 0.6"(D*L) Star Head Dia: 20mm/ 0.79"; Total Height: 36mm/ 1.4" Head Shape: 5 Point Star