1/4″ and 5/16″ hex shank fits all standard bit holders and hand-held drivers. Set includes 33 popular security insert and torx bits. 9 torx bits: T-8, T-10, T-15, T-20, T-25, T-27, T30, T-35, T40. 6-hex fractional bits: 5/64″, 3/32″, 7/64″, 1/8″, 9/64″, 5/32″. 6-hex metric bits: 2mm, 2.5mm, 3mm, 4mm, 5mm, 6mm. 3-torq set bits: No. 6, No. 8, No. 10. 4-tri wing bits: No. 1, No. 2, No. 3, No. 4. 4-spanner bits: No. 4, No. 6, No. 8, No. 10. 1 magnetic bit holder.