Duracable narrow v bottom blades are also known as cone chuck mounting blades. This means they are intended to be used with a cone chuck. We carry a selection of cone chucks on this site as well. You can achieve maximum cleaning of a drain line with 2-3 blades in a cone chuck. These narrow v bottom blades can be between 3" and 6", and be between .062" and .75" inches thick.
Narrow v bottom blades are best used with 5/8" to ¾" sewer cable. We also recommend either the DM30 sled machine or the DM162 upright machine.