12 Point Spline Bit Socket Set. 10 (Ten) PCS Spline Bit Socket Set. 1/4" DR: 4mm, 5mm, 6mm. Material: CRV Alloy Steel. 1/2" DR. Temper Proof: 16mm,18mm. 3/8" DR. Temper Proof: 14mm. 3/8" DR: 8mm, 9mm, 10mm, 12mm.
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