The Atlas No. 3 Spade Tongue Solderless Connectors are handy small U-shaped connectors used to hook up wires to a variety of Atlas and similar electrical switches, turnouts and accessories with screw terminals. They′re designed for AWG 18-22 gauge wire and No. 3 screw posts. Maximum width is .218′. Each pack has 24 connectors. Spade Tongue Solderless Connectors are part of the line of Atlas 150 electrical accessories and lighting.WARNING: This product can expose you to chemicals including LEAD, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov