STAHLWILLE 13008 Screwdriver bits for TRI WING® screws | Mister Worker®
1/4" Hex Shank 5-Point Star Robertson Triangle Tri-Wing Screwdriver Bit Set 50mm | eBay
Owl Tools TriWing Bit Set (10 Pack - 2.3inches Long Magnetic Heads) In the Following Tri Wing Bits Screwdriver Sizes: Y000, Y00, Y0, Y1, Y2, Y2.5, Y3, Y4, Y5, and Y6 - Amazon.com