High Load Capacity Marine Stainless Steel Nylon Block Universal Single Head Pulley,Smooth Silent Bearing,Rope Runner Boat Accessories(2 Pcs)

These definitely aren't the high-end blocks, but they also aren't anywhere near the price. They're a lot smaller than expected, but again.. Price, vs what you need them for? Definitely a good buy.

The steel portion of these are pretty thin so it doesn't seem to be too heavy duty. For light duty needs maybe and stainless steel is a good thing. The wheels are plastic/nylon so again it may not be for every need as they seem to be lightweight. The buckle appears to be pretty good though and should secure to whatever you need.

This is a set of two single rope pulleys. The pulley body is marine grade stainless steel and the grooved rope roller is black nylon. The roller has high quality bearings that will hold up to weather and high load use. The stainless steel single loop mounting eye also swivels. I look forward to a long life of using this on my boat.Would recommend this to anyone.

I'm giving these an overall 3-star rating because they are about half the price of a typical bearing block, but there are also some corners cut to get there.Here are my likes:• These are less than half the price of a comparable name-brand bearing block (pulley), and for the price, they're okay for many applications.• The construction seems adequate for the load rating, and the stainless steel seems to be of a decent quality.• They're overkill for the purpose where I put these to work - supporting lines for a wire amateur radio antenna.And my dislikes:• Under heavy load, the bearing isn't as smooth as the Sprenger or Harken bearing blocks I typically use. This probably won't be a significant factor if you're not using these constantly, as in a sailing application.• Under moderate load of several hundred pounds, the swivel tends to 'catch' a bit and doesn't swivel freely. This is more of an issue for most applications.• The edges of the shackle bow are very sharp as delivered, and required me to manually deburr them before I felt comfortable they wouldn't cut through their attachments.• The shackle bow retaining screw has no provision for locking it off, and it's fully threaded (instead of using the correct shoulder bolt). This is no issue when first installed, but after continual loading, the threads will become damaged and make the screw impossible to remove.Overall, though, these seem to be a decent 'budget' option or for use where you want a higher-quality pulley than you can typically find at the local hardware or big-box home improvement store.

I used these to install a wire dipole antenna in some trees. I used 5/16" rope through the pulley and tied to an egg insulator which is then tied to the wire. Having a pulley on each end allows me to easily raise and lower the antenna for repairs or adjustments.

These are good, serviceable single blocks for line up 3/8 inch (you might push it to 7/16). I took a picture with some 1/2 inch braided line forced through the block and you can see that it's too big to run smoothly.The blocks function as they should and are fairly light weight as well. Considering the reasonable price, these are a good alternative to the better known brands of marine hardware. The quality seems perfectly OK, but you can tell that they're not quite up to the expensive brands like Harken or Schaefer. For example, the edges of the stainless sides on the blocks aren't quite as nicely beveled as the expensive stuff. But for less that half the cost of the expensive stuff, these are an excellent option.

You get what you pay for on these.

I needed a simple pulley to hang small things in my garage - such as kids toys, punch bag etc. Nothing too heavy, so even though these are not super high quality, they serve the purpose I need them for.