The Screwdriver belt clip bit of 33 set is made from premium quality chrome vanadium steel. Designed for high performance screw-driving for industrial contractors and DIY enthusiasts alike. These bits feature grip tips where the head bites into the screw to resist damage to the screw and screwdriver. The kit comes with convenient storage clips to store the screw heads not used and comes with a magnetic bit holder/driver adapter. Kit Includes: Slotted: 3, 4, 4.5, 5, 5.5, 6, 7, 8, 9mm PH: 0, 1, 2, 3 PZD 0, 1, 2, 3 TX: 8,10, 15, 20, 25, 27, 30, 40 HEX: 1.5, 2, 2.5, 3, 4, 5, 5.5, 6 Main features Chrome vanadium Steel Construction Durable for long term use 33pc Set Grip Tip Engineering Technical Specification: Weight: 270g Specification Sheet. Lifetime Guarantee Included