The protection of your rope is critical, both to ensure safe operating conditions, and to minimize the replacement cost of this expensive consumable. We get this, which is why we created the Spring Loaded Vertical Assist. Using a super high strength torsion spring mechanism, we effectively eliminate the majority of the weight of the sheave housing, allowing your chock to begin aligning with little to no line tension, even when using ultra light synthetic rope. This eliminates abrasion by keeping the rope where it belongs: in the sheave, keeping you safer, and saving you money.