Features 8 pieces in 1 set: includes 8 pieces combination taps, sufficient in quantity, can be used and replaced at any time. SPIRAL FLUTE These taps are equipped with a spiral groove that provides better chip removal as well as stable and efficient operation. Durable material: use of high-speed steel material with titanium coated surface, high hardness and rosiness. Multiple sizes: including 6 different tap sizes, the thread is standard and suitable for different tapping requirements. 1/4" Hex Shank:1/4" hex shank, easy to install, can be used for drilling, tapping and chamfering, etc. Specification: Item Type: Spiral Flute Tap Material: high-speed steel. Application: for drilling, tapping and chamfering Surface treatment: Ti coating Colour: gold and silver. Tap specifications: M3 x 0.5mm, M4 x 0.7mm (2pcs), M5 x 0.8mm, M6 x 1mm (2pcs), M8 x 1.25mm, M10 x 1.5mm Tap Shank Type: Hex Shank Tap Shank Size:1/4\" SpecificationThread PitchDiameterDrilling LengthThread Cutting LengthTotal LengthM30.5mm3mm7mm/0.28\" 12mm/0.47\" 65mm/2.56\" M40.7mm4mm7mm/0.28\" 14mm/0.0.28\" 55 inch 55 5 mm/2.56 inches 2.64 inches M61 mm 6 mm 9 mm/0.35 inches 15 mm/0.59 inches 68 mm/2.68 inches M81.25 mm 8 mm 11 mm/0.43 inches 21 mm/0.83 inches 69 mm/2.72 inches M101,5 mm 10 mm 13 mm / 0.51 inches 23 mm / 0.91 inches 70 mm / 2.76 inches. Package list: 8 x spiral flute taps. Note: If taps are used for drilling, please bring protective equipment to prevent dirt from splashing out and hurting yourself. Package List 8 x Spiral Flute Tap