【Important Compatibility Note】This drain snake drill accessory set is not compatible with C10 or C11 cables . DO NOT use it with cables of 7/8-inch (22.23mm) or 1-1/4-inch (31.75mm) diameter 【Premium Material and Durability】Crafted from high toughness manganese steel with a professional rust proof coating , these drain snake attachments effectively resists water, rust , and repeated bending 【Package Inclusion and Core Function】This drain snake drill attachment set includes 4 auger drill bits , 4 cutting tools , and 1 screwdriver , designed for easily handling grease and other soft clogs 【Quick Connect Design for Efficiency】Drain auger drill attachments feature a quick connect structure , allowing no tool and effortless installation or replacement . This significantly boosts unclogging efficiency , making it especially suitable for frequent use scenarios 【Compatibility Details】Drain auger bits: Compatible with models K-400, C-4, C-6, C-7, C-8, and C-9. Sink auger: Designed for heavy duty cable setups with a 5/8-inch (16mm) interface . Heavy duty cutting tools and augers: Suitable for cable sizes 5/16-inch, 3/8-inch, and 5/8-inch (7.94mm, 9.53mm, 15.88mm), Manufacturer: PATNFR