ISC Stainless Steel Screwlock Rigging Pulley From ISC: Following feedback from a number of shows and competitions a couple of significant modifications were made to the RP056 Stainless Steel Screwlock Rigging pulley.
The locking screw has been changed to do away with the welded bar which has been replaced with a knurled-head screw which is easier to use. The knurled head screw now has a hole in it so that a screwdriver or similar can be put through it to allow more leverage in opening or locking the pulley. This feature will be available on both the steel and stainless steel versions.
To reduce weight and make it look cool and sexy we have put flame cut-outs into the side plates these do not affect the strength (the ultimate breaking strength is still well in excess of 100kN/22,000lbs) but they do help to reduce the weight down to 1.43kg/3.15lbs. This feature will only be available on the polished stainless steel version.
Max Rope Diameter: 16mm
Max Working Load: 10,000kg
Safe Working Load: 2,000kg