Total Size: 10mm x 5.5mm/0.4" x 0.22"(L*Head.Dia); Product Name: Button Head Torx Screw Material: 304 Stainless Steel; Weight: 16g Package Content: 30pcs x Button Head Torx Screw; Torx Head Type: T10 Main Color: Silver Tone; Thread Size: M3 x 8mm/0.12" x 0.3"(Dia*L) Thread Pitch: 0.5mm Tamper Proof Security Torx Machine Screws. Special drivers are required for the installation and removal of Security fasteners. These fasteners are made from highly corrosion resistant 304 stainless steel making them both tamper and weather resistant. Anti Theft Machine Screws provide a higher level of security for you with their drive design, which prevents removal with normal screw drivers. Used widely in the home and office appliance, communication equipments, ship assembly and other machinery industry.