b'Midrange BlocksAbout Classic blocks: see feature page at beginning of this section.1541 154498 mm 1540(3 7/8") 1548 1542158660 mm Hexaratchet blocks(2 3/8") Midrange Hexaratchet blocks grip loaded sheets, yet allow sailors to ease and trim quickly and with complete control. A switch on the side engages and disengages the ratchet mechanism. 1545 1546 1559 1560 Eight-sided aluminum sheave for 10:1 or 15:1 holding power with 180 wrap.1564STANDARD1549 1550 1571 15551556 1565 1566HEXARATCHETTorlon is a registered trademark of Solvay Advanced Polymers L.L.C.Sheave Shackle pin Max line Maximum BreakingPartLength working load loadWeightN o. Description in mm in mm oz g in mm in mm lb kg lb kg Standard 1540Single36 1/81561336789/1614180081650002268 765/16 15413767 1/81841439789/1614180081650002268 Single/becket5/161542Single/aluminum sheave3766 1/8156154255/1689/1614180081650002268 Double3767 1/219125.572389/16142800127070003175 15445/16 15453768 1/221626.57515/1689/162800127070003175 Double/becket14 1546Triple3767 3/41973610205/1689/1614380085003856 1724 1548Cheek*3764 3/8111113129/16150068042001905 14 Fiddle3;276;518 1/22165/1689/16180081650002268 15591748214 1560Fiddle/becket3;276;519 1/2185105/1689/16180081650002268 24114 Fiddle/280 Cam-Matic/becket3;276;519 1/224124.56955/1689/1614180081650002268 15641586Single/high-load**3766 1/8156133675/1689/16142300104350002268 Hexaratchet 1549Single/clockwise3766 1/8156143975/1689/16141800816500022681550Single/becket/clockwise376184154255/1689/161418008165000 7 1/82268 1555Triple/280 Cam-Matic/clockwise3767 3/419749138989/16143800172485003856 5/16 15563768 3/42225114465/1689/16143800172485003856 Triple/280 Cam-Matic/becket/clockwise 15713766 1/8156143975/1689/16180081650002268 Single/counterclockwise14 15653;276;518 1/221626.57515/1689/1614180081650002268 Fiddle/280 Cam-Matic/clockwise 780 1566Fiddle/280 Cam-Matic/becket/clockwise3;276;519 1/224127.55/1689/1614180081650002268 *6 mm (1/4") RH fasteners. **High-load Midrange blocks use Torlon ball bearings.41'