Ronstan Shocks - Sheaveless Blocks 500kg
Ronstan Shocks - Sheaveless Blocks 500kg

Ronstan Shocks - Sheaveless Blocks 500kg

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Ronstan Shocks - Sheaveless Blocks. With no moving parts Shocks provide ultimate durability and are maintenance free.. They are ideal where the sand and grit would compromise a bearing system or where regular flushing out isn't possible. Their gentle 3 dimensional geometry is kind on lines, but strong enough to cope with poor leads.

Shocks are designed primarily for 'soft attachement', spliced to a line end or lashed in place. The elongated attachment aperture is ideal for webbing attachments, ensuring the intended orientation is maintained.

The applications for Shocks are virtually limitless, including numerous high performance dinghies and small sailboats rigging applications including trapezes, cunninghams, barber haulers and kite bridles. They are also handy on larger boats for uses such as lazy jacks, sail covers, tie-downs, ladders and motor hoists.

While the Shock only weights 12gms, they have outstanding performance in strength and weight stakes. These Shocks will accept lines from 3.0 to 10.0mm and are available in Red and Blue.


  • Performance & versatility
  • Ultra lightweight
  • Ultra compact
  • Durable
  • Colour coded
  • Impact resistant
  • Small line optimised
  • High load capacity
  • Poor alignment tolerant
  • Soft attachment compatible
  • Grit & salt resistant
Rope Ø 3.0-10 mm
Height 14.5 mm
Width 24.8 mm
Length 36 mm
Fastener Ø mm
Fastener Hole Centres mm
M.W.L. 500kg
B. L. 1000 kg
Weight 12 g

After ordering online, you will receive an automated email confirmation containing your order details. Your order will then be confirmed within a few minutes of placing your order.

It is our policy to ensure we deliver to our customers in a timely manner. In order to achieve this we use a range of freight companies depending on the size and weight of your order. In some instances we may use a number of carriers to get your products to you. For example, chain may come by road, some electronic equipment by air.

Most orders are shipped within 2 - 5 Days

Shipping rates

Orders delivered to Australian Post Codes under $399 attract an $15.00 shipping charge.

Orders of $399 or more ship free.* Excludes Bulky Or Dangerous Goods

For Remote areas and bulky items. If the cost to send is vastly different to our standard delivery costs, someone from our team will contact you prior to dispatch to arrange further payment or to issue a refund if you are not happy with the additional charges.

International orders will be charged at $0.00 initially and our staff will be in contact with a shipping quote. If the quote is not accepted the customer reserves the right to cancel their order and be refunded in full.

Should you have any queries or concerns about shipping, please don't hesitate to get in touch by clicking the support button on bottom right of the page.

What Our Customer Say

i ordered 6 port holes and these guys found exactly what i needed and went out of there way so much to help me 5 star service .


Prompt shipping and a good price. Item was well packed and arrived as ordered and undamaged. Thanks

Tom Mercer

Good quality parts easy to order on downside a couple of delays but they were quick to call and let me know

Darcy Scholte

Good service. Parts delivered on time and in good condition. There was a bit of mix up with one of my first orders but very promptly sorted and sent our to...


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