Here at BCF we carry a massive range of parts and accessories to go with our huge range of products, so no matter what you find yourself needing, if it's related to Boating, Camping or Fishing you're sure to find it. This Pair of Black Bow Knuckles are made of hard-wearing nylon and are designed for use on a 25mm tube. Especially for use with boat biminis, canopies, rocket launchers and racks. They are designed to clip around the tube that the canopy, bimini or launcher is made from. Once around the pole and in the correct position, they are used in conjunction with a bow-knuckle and a thumb-screw to secure them in place and adjust the tension of the canopy, bimini or rocket launcher as required. Available for the full range of biminis, rocket launchers, canopies and all the associated parts and accessories. So call into our store and talk to one of our friendly, knowledgeable staff to find the part that is right for you.