Our Carbide Chain Knockers for the M12 FUEL™ High Speed Chain Snake deliver a wall-to-wall clean that can tackle heavy build-up and deliver strength and durability for long-lasting performance. These steel chain knockers feature durable construction to tackle tough clogs in 1-1/4” lines with stainless steel set screws for corrosion resistance. Additional accessories available: 1-1/4” – 1-1/2” Standard (48-53-3033), 2” Standard (48-53-3034), Replacement Cable (48-53-2519), and Grease Penetrating Head (48-53-3037).