50% OFF CODE: VBKLB7H2 Wokonl Red Dot Mounting Screws Kit includes 19 precision screw sets (M3, M4, #6-32), each screw type includes 3 pieces (57 pieces total), providing a spare for lost or damaged screws. Various Sizes:M3 x 0.5(5mm/6mm/11mm/12mm length, diameter:5.5mm) | M4 (9.8mm/11.3mm/12.8mm length, diameter:6.2mm) | M4 x 0.7 (8.6mm/10.1mm length, diameter:8.4mm) | #6-32 (8mm/9.5mm/11mm/12mm length, diameter:7mm) | #6-32 (8mm/9.5mm length, diameter:6.35mm | 8.5mm/10.8mm/12.3mm length, diameter:6.5mm)