Wilmar Corporation was founded in 1971. Set includes the most common tamper proof sizes. Torq: #6, #8, #10. Tri-wing: #1, #2, #3, #4. Spanner: 4, 6, 8, 10. Pozi: PZ1, PZ2, PZ3. Slotted: 1/4". Tamper Resistant Star: T8, T10, T15, T20, T25, T27, T30, T35, T40.