Klein Tools Impact Bit Set 33804 23 Piece ProFlex Ratcheting T Handle (S2 Tool Steel SAE Metric TORX Fastener Driving) Parts Organizer (1) 1 4" Carbide Tipped Drill (1) 1 4" Carbide Tipped Drill Bit (1) 1 2" 72 Tooth 12 Point Ratcheting Combination Wrench S2 Tool Steel Torsion Zone: Premium steel bits incorporate impact absorbing torsion zones to maximize durability and prevent premature bit fracture Brand Manufacturer Klein Tools Model Number Part ID 33804 Total Piece Count 23 Pieces Tool Set Application Type Impact Fastening and Driving Kit Bit Material Composition S2 Tool Steel with Torsion Zone Measurement Standards SAE