uxcell M5x10mm Round Head Screw On Straight Knurled Clamping Knob Grip 10pcs Color: Brass Tone , Black; Weight: 39g Package Content: 10pcs x Clamping Knob; Product Name: Clamping Knob Type: Screw On; Head Size: 16 x 11mm/0.63" x 0.43"(D*H) Thread Length: 10mm/0.4"; Thread Diameter: 5mm/0.2" Total Height: 21mm/0.83"; Material: Metal, Plastic