ITEM NAME:5PCS/Set HSS M3 M4 M5 M6 M8 Machine Spiral Point Straight Fluted Screw #JT1 Product Description Description: Item specifics Number of Pieces: 5pcs is_customized: Yes Brand Name: qst DIY Supplies: Metalworking Model Number: qst-H5 Type: Tap & Die Set Specification:.Material: HSS. Material: High Speed Steel 6542; 45 steel processing (Steel mould; Bearing Steel). Number of Pieces: 5pcs. Type: Tap & Die Set. Model Number: qst-H5. If item is defective after 3 months, you can still send it back to us.