Refaxi&reg;Precision Mini 8 in 1 Slotted Phillips Bits Screwdriver Pen Set Repair Tools There is a magnetic hole inside, so you can put in bits easily. It's portable and practicle for repairing equipment. Material: Alloy, Slotted: 2.0, 2.5, 3.0, 3.5(mm) Philips: PH00,PH000,PH1,PH2 Handle Length: Approx. 4.33inch/11cm