Single Block with Swivel Shackle
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SCHAEFERSingle Block with Swivel Shackle


Fulfilled from vendor
Model # 4492369 | Mfg # 300-05UPC # 740507002892
Single Block with Swivel Shackle




Single Block with Swivel Shackle

Name Value
Ball Bearings Delrin
Becket No Becket
Diameter 7/16 Inch or 11 mm
Direction Any
Integral Cleat No Integral Cleat
Mount Type Swivel Shackle
Ratchet Non Ratcheting
Safe Working Load 1000 Pounds
Sheave Diameter 37 mm
Type Single

Product Overview

Schaefer Single Aluminum Ball Bearing Block with swivel shackle allows either a 2:1 or 3:1 purchase. 

Schaefer furling blocks offer unique, smooth and reliable solutions for all furling systems. Simple clamp on design adapts to 1"-1-1/4" stanchions and features a delrin® ball-bearing. Strong, smooth-running blocks feature stainless steel or aluminum cheeks, stainless steel heads and straps, and Delrin® sheaves. Pulpit Furling Lead and Clamp-On Furling Block fit 1" tubing for mounting to stanchions.  Ideal for furling line applications on most boats. Singles and Cheeks are ideal for control lines and halyards.

Key Features 

  • Delrin® ball bearing sheave
  • Stainless steel shackle
  • Swiveling head
  • Sheave Diameter: 1 7/16"
  • Max. Line Diameter: 7/16" (12 mm)  
  • Max. Working Load (MWL): 1000 lb. (410 kg)  
  • Weight: 2.4 oz (68 g) 
  • Length: 3 25/32" (96 mm)


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