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 loadloadWeightNo. Description in mm in mm oz g in mm in mm lb kg lb kg Standard 1540Single3766 1/8156133675/1689/16141800816500022681541Single/becket3767 1/8184143975/1689/16141800816500022686 1/88 1542Single/aluminum sheave376156154255/169/1614180081650002268 1544Double3767 1/219125.57235/1689/161428001270700031751545Double/becket3768 1/221626.57515/1689/161428001270700031751546Triple3767 3/41973610205/1689/161438001724850038561548Cheek*3764 3/8111113129/16141500680420019051559Fiddle3;276;518 1/2216174825/1689/16141800816500022681560Fiddle/becket3;276;519 1/2241185105/1689/16141800816500022681564Fiddle/280 Cam-Matic/becket3;276;519 1/224124.56955/1689/1614180081650002268 1586Single/high-load**3766 1/8156133675/1689/16142300104350002268 Hexaratchet 1549Single/clockwise3766 1/8156143975/1689/16141800816500022681550Single/becket/clockwise3767 1/8184154255/1689/16141800816500022681555Triple/280 Cam-Matic/clockwise3767 3/41974913895/1689/161438001724850038561556Triple/280 Cam-Matic/becket/clockwise3768 3/42225114465/169/16143800172485003856 8 1571Single/counterclockwise3766 1/8156143975/1689/16141800816500022681565Fiddle/280 Cam-Matic/clockwise3;276;518 1/221626.57515/1689/16141800816500022681566Fiddle/280 Cam-Matic/becket/clockwise3;276;519 1/224127.57805/1689/1614180081650002268*6 mm (1/4") RH fasteners. **High-load Midrange blocks use Torlon ball bearings. 40'