This fully adjustable support pole is 3 support poles in one! Regardless of how your boat cover is designed to work with a support pole, this will do the trick. Comes with a male canvas snap, a grommet tip, or a plain end cap. So, if you have a female canvas snap or a grommet on your boat cover, you can still get a support that will work. The pole is aluminum, with a durable plastic adjuster to set the correct height for your cover.