Izingxenye ezigoqekayo ezikude ziqinisekisa ukugoqeka kwebhokisi ngama-degree angu-180 emgqeni wokuqala kanye nama-degree angu-135 emgqeni wesibili, ukuze kuvulwe ibhokisi kalula ngenkathi kufakwa izinto, ukushintshwa kwezingxenye okuguquguqukayo kunikeza lula kakhulu ekusethweni kwezesekeli kwamanye amabhokisi ephethini.