Steel Vision's Bit Set contents are carefully selected so they contain exactly what you need. They are made from high-strength impact grade steel and are compatible with all brands of impact drivers. A sturdy and compact storage box helps keep bits organized. The assortment of common bit sizes allows you to use these in your home and in a professional setting. Set Includes: (34) 1″ Bits: (2) PH1, (2)PH2, PH3, (2)PZ1, (2)PZ2, PZ3, (2) SQ1, (3) SQ2, (2) SQ3, SL3, SL4, (2) SL4.5, SL6.5, T10, (2) T15, (2) T20, T25, T30, T40. Hex: 3, 4, 5, 6. (19) 2″ Bit: (2) PH1, (2) PH2, PH3. (2) PZ1, (2) PZ2, PZ3. SQ1, (2) SQ2, SQ3. SL3, SL4, (2) SL4.5, SL6.5. (3) 3″ Torsion Bits: Hex 4, 5,6mm. (1) 4″ Bit: PH2. (5) 2″ Nutsetter: 1/4″, 5/16″, 3/8″, 7/16″, 1/2″. (3) 2-1/2″ Adapter: 1/4″, 3/8″, 1/2″. (1) 3″ Extension Bit Holder. (1) 2″ Bit Holder