Head Style:Round Phillips HeadMaterial:410 Stainless SteelProduct Name:Self Drilling ScrewsWeight:41gThread Size:M4.2/0.17 inch (D)Drive Type:PhillipsMain Color:SilverShaft Length(Include Tip):13mm/0.5 inchOverall Size:15x10mm/0.6x0.4 inch(Total.L*Head.D)It is wood drill tail screw, mainly used in steel structure Caigang watt fixed can also be used for fixing the simple construction of the sheet material.It can not be used in combination with metal and metal.Teks self-tapping screws provide secure fastening with strong holding power without the need to pre-drill. Engineered drill-point and flute remove material efficiently and properly size the hole for threads.Package Content:30pcs Self Drilling ScrewsNote: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.