The version with same design but reverse threads is called Opsit screw. Ideal Products Ideal wire strippers. Login to My Account. Fans Sunon Ebmpapst Innovative. Product Range. It is usually used on electronics equipment. Medium Voltage Medium voltage products. Roller Tool Cabinets Roller cabinets. Hardware Metal Working Hardware. Toner Vacuum Cleaners Vacuum Cleaners. Access-control WaterProofing. It is commonly used on Nintendo products. A variation is a kind where the three "wings" are joined in the center with no triangular hole. Component Storage boxes Inter-stack boxes Component Storage boxes. Network Testers Ideal Network Testers. Easy to access the deep screws on Wii case Won't cause damage to the triwing security screws.{/INSERTKEYS}{/PARAGRAPH} Tri-wing, as the name suggests, is a screw with three "wings" and a small triangular hole in the center. Ladders Ladders. Measurement Tape Measures Verniers. A somewhat similar-looking design where three short radial slots are not joined in the center is called a tri-groove screw drive. Tri-wing A tri-wing tool and screw The tri-wing, also known as triangular slotted, screw drive has three radial slots. Promotions Promotions. {PARAGRAPH}{INSERTKEYS}Add to Quote.