Swpeet 12Pcs M4 x 20 Jack Nuts Petal Nuts Expansion Nut Thins Fixings Dowels with Screws Assembly for Hollow Wall Iron Skin Line Use in Thin Soft Wall (M4 x 20) Size:M4 x 20 2 125mm 14 Vaules Breadboard Jumper Style:Up Cut 2 125mm 14 Vaules Breadboard Jumper Wire Kit 2 125mm 14 Vaules Breadboard Jumper Wire Kit 2 125mm 14 Vaules Breadboard Jumper Wire Kit Package 140Pcs 560Pcs 840Pcs 12 Position Double Row Terminal Barrier Strip Screw Terminal 10A 20A 12 Position Double Row Terminal Barrier Strip Screw Terminal 10A 12 Position Double Row Terminal Barrier Strip Screw Terminal 20A For wire size 22 16 AWG 22 16 AWG 22 16 AWG Spade Connector Wire Crimp Terminal Block Assortment Kit Male Female Quick Disconnects Spade Wire Crimp Terminal Connectors（Red） Insulated Wire Crimp Connectors Assortment Kit For wire size 14 22AWG 22 16AWG 12 22AWG reducing its surface roughness You will get 12Pcs M4 Jack Nuts Petal Nuts Assortment Kit Tighten the nut with the other wrench plier