33pc Security Bit Set Tamperproof. T8, T10, T15, T20, T25, T27, T30, T35, T40. Hex Key: 5/64″, 3/32″, 7/64″, 1/8″, 9/64″, 5/32″. Tri-Wing: No 1, 2, 3, 4. Spanner: 4, 6, 8, 10.Torq-Set: 6, 8, 10. Hex Key: 2, 2.5, 3, 4.5, 6mm. For repair and maintenance of electronic, electrical and mechanical equipment.