Shocks by Ronstan

Shocks by Ronstan
The ultra lightweight alternative to a block, the Shock (SHeaveless blOCK) is compact and versatile. Designed to be used with small diameter line, it can be easily attached using a Dyneema Loop or simply by lashing it to the deck. Originally designed for kiteboarding control lines, the shock can be used virtually anywhere on a dinghy you would use a traditional block. Made of anodized alumnium. Available in red, blue, gray or green.

Part No. Weight Length Width Depth Rope/Line Capacity Maximum Attachment Breaking Load
oz g in mm in mm in mm in mm in mm lb kg
RF8080 0.09 2.5 0.90 22.9 0.59 14.9 0.33 8.5 0.05 - 0.20 1.4 - 5.0 0.31 (wide) /
0.20 (diameter)		 8 (wide) /
5 (diameter)		 770 350


RF8080 Ronstan Shocks Pair: 5mm(3/16in) Line Price: $15.22
Low Friction Rings by Antal

Low Friction Rings by Antal
Made of Low Friction Aluminum. Ability to withstand a high strength while still being incredibly lightweight. Highly reliable and last longer than a bearing unit. These rings come in 5 sizes with 7, 10, 14, 20 and 28 mm holes for any requirement. Also available with a Dyneema loop for a fast and easy connection. Can be used in replacement of a low friction block and ball bearing.

Common applications include: jib leads, backstays, lazy jacks, furling line leads, fairleads.

Part No. Description Diameter Inside Dia. Thickness Weight
in mm in mm in mm oz g
ATR0705 7mm LF Aluminum Ring 0.71 18 0.28 7 0.35 9 0.17 5
ATR1007 10mm LF Aluminum Ring 0.98 25 0.39 10 0.47 12 0.17 5
ATR1410 14mm LF Aluminum Ring 1.37 35 0.55 14 0.59 15 0.42 12
ATR2014 20mm LF Aluminum Ring 1.96 50 0.78 20 0.86 22 1.55 44
ATR2820 28mm LF Aluminum Ring 2.75 70 1.10 28 1.22 31 4.23 120


Part No. Description Line Diameter Line Length SWL
in mm in mm lb kg
ATRL30 60mm Dyneema /7mm LF Aluminum Ring 0.39 10 2.36 60 440 200
ATRL40 70mm Dyneema /10mm LF Aluminum Ring 0.39 10 2.75 70 881 400
ATRL45 80mm Dyneema /10mm LF Aluminum Ring 0.39 10 3.14 80 1,543 700
ATRL50 90mm Dyneema /14mm LF Aluminum Ring 0.55 14 3.54 90 1,984 900
ATRL60 110mm Dyneema /14mm LF Aluminum Ring 0.55 14 4.33 110 3,306 1,500
ATRL61 130mm Dyneema /20mm LF Aluminum Ring 0.78 20 5.11 130 3,306 1,500


ATR0705 Antal 7mm Low Friction Ring Price: $11.90 ATR1007 Antal 10mm Low Friction Ring Price: $14.60
ATR1410 Antal 14mm Low Friction Ring Price: $15.90 ATR2014 Antal 20mm Low Friction Ring Price: $20.40
ATR2820 Antal 28mm Low Friction Ring Price: $29.90 ATRL30 Antal 7mm Ring w/ 60mm Dyneema Loop (1) Price: $39.90
ATRL40 Antal 10mm Ring w/ 70mm Dyneema Loop (1) Price: $46.90 ATRL45 Antal 10mm Ring w/ 80mm Dyneema Loop (1) Price: $49.90
ATRL50 Antal 14mm Ring w/ 90mm Dyneema Loop (1) Price: $52.00 ATRL60 Antal 14mm Ring w/ 110mm Dyneema Loop (1) Price: $58.00
ATRL61 Antal 20mm Ring w/ 130mm Dyneema Loop (1) Price: $62.00
Low Friction Rings by Schaefer

Low Friction Rings by Schaefer
Available in 10mm, 15mm and 20mm sizes. These machined aluminum rings are hardcoat anodized with soft radius turns for low friction and durability. Perfect for countless applications on both racing and cruising boats from backstay adjusters, vangs, in-haulers etc.

Part No. Description Outside Dia. Inside Dia. Width
in mm in mm in mm
SCFR1008 10mm Low Friction Ring 29/32" 23 27/64" 10.5 1/2" 12.6
SCFR1510 15mm Low Friction Ring 1-3/16" 30 5/8" 15.5 39/64" 15.2
SCFR2012 20mm Low Friction Ring 1-47/64" 44 13/16" 20.5 59/64" 23.2


SCFR1008 Schaefer 10mm Low Friction Ring Price: $13.12 SCFR1510 Schaefer 15mm Low Friction Ring Price: $15.00
SCFR2012 Schaefer 20mm Low Friction Ring Price: $18.16
Holt Nautos Web/Tie Sheaves

Holt Nautos Web/Tie Sheaves
Manufactured from solid aluminum and hard anodized, these plain sheaves can be strapped or tied into systems to form high load, plain bearing turning points.

Common applications for these web/tie sheaves include jib inhaulers and for use on big boat bobstays and tacklines; can easily be fitted to any suit applications on any size of boat.

Part No. Description Diameter Inside Dia. Thickness SWL Break Load Weight
in mm in mm in mm lb kg lb kg oz g
HAHT95010 40mm Web/Tie Sheave 1-9/16 40 5/8 16.2 15/32 12 2,156 980 3,960 1,800 0.625 17.5
HAHT95011 60mm Web/Tie Sheave 2-3/8 60 31/32 24.3 5/8 16 5,280 2,400 11,000 5,000 2.10 60
HAHT95012 80mm Web/Tie Sheave 3-5/32 80 1-9/32 32.4 25/32 20 11,000 5,000 22,000 10,000 5.00 140


HAHT95010 40mm Web/Tie Sheave Price: $19.36 HAHT95011 60mm Web/Tie Sheave Price: $60.70
HAHT95012 80mm Web/Tie Sheave Price: $90.74
Ferrules by Hall Spars

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Ferrules by Hall Spars
Hall Spars & Rigging has developed a series of ferrules to be used for cascading purchase systems, floating leads, fairleads or any other use you can find for an anodized piece of aluminum. Ferrules are not new technology, especially in the higher end racing scene. Despite how simple they are to make no one seemed to know where to find them in the United States. As they listened to their customers and potential future customers they went about testing, designing and producing them. Do whatever you like with Hall's ferrules. Better yet, show them some way of using them that they had not thought of yet!

Part No. Description Outside Dia. Inside Dia. Width Break Load
in mm in mm in mm lb kg
HSPR117025 5mm Ferrule 15/16" 24 13/32" 10 15/32" 12 2,500 1,134
HSPR117026 6mm Ferrule 1-5/32" 29 7/16" 11 1/2" 13 7,000 3,175
HSPR117027 8mm Ferrule 1-13/32" 36 9/16" 14 5/8" 16 12,500 5,670
HSPR117028 9mm Ferrule 1-13/16" 46 25/32" 20 11/16" 18 TBD TBD
HSPR117029 10mm Ferrule 2-1/8" 54 15/16" 24 7/8" 22 17,500 7,940
HSPR1170210 12mm Ferrule 2-17/32" 64 1-1/32" 26 15/16" 24 TBD TBD


HSPR1170210 Ferrule Use with 12mm Line Price: $95.00 HSPR117025 Ferrule Use with 5mm Line Price: $35.00
HSPR117026 Ferrule Use with 6mm Line Price: $40.00 HSPR117027 Ferrule Use with 8mm Line Price: $45.00
HSPR117028 Ferrule Use with 9mm Line Price: $75.00 HSPR117029 Ferrule Use with 10mm Line Price: $80.00

Double Bobbin Inhauler
Double Bobbin Inhauler With more and more sailboat designs using inhaulers for proper headsail trim, a better design was necessary to combat rings that deformed under higher loads. Enter the Double Bobbin inhauler; made with 6061 black anodized aluminum, these inhaulers are perfect for boats up to 45 feet long, having been tested on Farr 40's and NYYC 42's with great results.

The Double Bobbin is also kinder to line, creating a smoother surface that does not point load the line. With proper setup, a 4:1 advantage is attainable for ease of adjustment.

Sold individually.

Part Number Weight Overall Length Large Opening Diameter Small Opening Diameter
oz g in mm in mm in mm
OBM0011 2.4 68 3-1/2 89 3/4 19 1/2 13


OBM0011 Double Bobbin Inhauler (1) Price: $100.00
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