Sailboat Dinghy Hardware 50mm 2" Single Swivel Shackle Block Small Boat Block Master BP-0501F 50 mm Plain Bearing blocks are typically used for high loads for Halyard tuning, Mainsheet systems, Mast foot blocks, Mast head blocks and boom vangs. An exclusive Face to Face locker system can be easily engaged to position shacke in either of two directions or just free to swivel. A locker system also can take more loads then traditional ways without damaging the block and hassle. Patent pending in Australia, US, UK, France, Netherlands, China, Germany, and Taiwan. •Do not use Master products to human suspension! Specification:Brand: MasterPart Number: BP-0501FSheave Ø (mm) 50 mmSheave Ø (in)2 inLength (mm)101 mmLength (in)4 inWeight (g)70 gWeight (oz)2.47 ozMaximum line Ø (mm) 10 mmMaximum line Ø (in)3/8 inMaximum working load (kg)552 kgMaximum working load (lb)1148 lbBreaking load (kg) 1050 kgBreaking load (lb)2310 lb•Do not use Master products to human suspension! Destination custom duty/tax are not included in the listing price; it is the customer's responsibility to pay for custom duty if any. Shipping by China Post ePacket/Registered Air Mail with shipping tracking number provided. It will take about 3-4 weeks’ time to deliver to you after shipping out, some countries may take longer time to deliver. If you want faster delivery, please contact me for shipping upgrade. img src="https://www.tupianku.com/view/large/15361/1-4.png" border="0" alt="Tupianku Image Hosting Service" />