Cycling Bicycle Internal Cable Routing Tool For Bicycle Frame Shift From Besnin. Bicycle stringing tool: Our bicycle stringing tool includes 1* quick traction rubber adaptor?1*internal cable adaptor?1*Di2 E-tube adaptor?1*hydraulic brake adaptor?1*short magnet guider?1*long magnet guider?1*main magnet. Bicycle stringing tool: Our bicycle stringing tool includes 1* quick traction rubber adaptor?1*internal cable adaptor?1*Di2 E-tube adaptor?1*hydraulic brake adaptor?1*short magnet guider?1*long magnet guider?1*main magnet. Polymer-coated, stainless steel inner cable reduces the sliding resistance to achieve light and quicker operation and is rust resistant. We offer 3 adaptors for the installation of brake hoses, shifter hoses, hydraulic hoses, internal cables, electrical cables, etc. The main magnet has a powerful magnetic force that guides your inner cable (or brake hose,electric wire etc.) freely through the frame Note: this bicycle Internal Cable Routing Tool does not work with steel frames. (it may cause insufficient or no magnetism when it work on steel frames)And it is only suitable for frames with an inner cable diameter of 6mm or more If you receive the item that are missing accessories or have any questions about the installation, please email us in the first instance and we will actively work to resolve them for you.