SIZEModel: CD-25, 2.5mm Tip Width, 0.4mm Tip Thickness. SPINNING DESIGNSwivel cap design, convenient for precise screw positioning, flexible rotation. CERAMIC SCREWDRIVER BITSMade of precision zirconia, not easy to be weared, non-magnetic, non-static, high insulated. MATERIALMade of ceramics bits and plastic handle, which is very easy to hold and useStrong hardness, not easy to wear, durable to use. APPLICATIONSuitable for high frequency circuit adjustment. Fit for various inductance, semi variable capacitor, half electric resistance and big brand SMD parts.