uxcell M5 x 40mm Round Head Screw On Thumbscrews Knurled Knob Product Name: Knurled Knob; Type: Screw On Head Size: 15 x 10mm / 0.6" x 0.4"(D*H); Thread Length: 40mm / 1.6" Thread Diameter: 5mm / 0.2"(M5); Total Height: 50mm / 2" Material: Metal, Plastic; Color: Silver Tone , Black Weight: 10g; Package Content: 1 x Knurled Knob