Upgrade your electrical installations with the Sigma Engineered Solutions ProConnex C-510 Combination Connector, now available in a convenient 100-pack. This versatile connector simplifies electrical installations by efficiently terminating AC, MC and FMC cables to a 1/2-inch knockout, providing secure and reliable connections. Compatible with aluminum or steel 14/2 to 10/3 AC or MC cables, as well as 3/8-inch FMC, it offers flexibility for various wiring applications. The inclusion of a tri-combo screw ensures easy installation and a tight grip. Crafted from durable zinc die-cast material, this connector ensures long-lasting performance. With UL and CSA listings, this product meets safety standards and ensures peace of mind.