TengTools Screwdriver – TPX Type For TPX type screws with tamper-proof heads. Round shaft of TT-MV PLUS steel. Phosphated black tip. Ergonomically designed two component handle with hanging hole. • TPX No.: TPX 10 • Max Head Width: 2.74mm • For Screw: M3-3.5 • Blade Length: 100mm • Handle Length: 108mm