oval is usually the better choice

The machining masterminds at Rock Exotica have designed carabiners that are not only machined well

include parallel flats to prevent table-top roll-off

this carabiner provides smooth and efficient use for pulleys

Easy Rider™ – XL Stringing Block with 3” Nylon Roller Brand_Neos oval is usually the betterThe Easy Rider XL Stringing Block with 3 Nylon Roller helps maintain cable alignment during aerial cable placement. Its high strength steel frame is lightweight and economical, making it an efficient choice. With a 3 inch wide roller, it can easily stack while being pushed by a lasher. Comes with (1) overlash block with nylon roller. Product Features Non binding roller axle allows rollers to ride easily and rotate smoothly Supports fiber optic cable