Hetra (70mm) 2.75 In. Magnetic Power Bit 10 Piece Pz-2, Pozi Drive Power Bits #2 10 piece Magnetic 2.75 In. Power Bits PZ-2. Rockwell Hardened + / - 60. Can be used with our with out our Hetra Power Bit Holder/Extension. Pozi Drive Power Bit #2