Features 1、Easy Drilling: Clear and incisive thread makes it much easier to drill into the metal, which also ensures firm fixing and no slipping. 2、110Pcs in All: There are 110pcs M4.2 self drilling screw in 6 different specification, meeting your working needs in various places. 3、Practical Use: Allows for broad application in connecting metal, wood, glass fibre, plastic and so on, suitable for industrial using. 4、Good Material: Mainly made from premium carbon steel material that rustproof and not likely to deform, also has excellent durability. 5、Simple Carrying: Designed to have a light weight and a compact size, the hex washer head screw has a box for carrying and storage. Specification Item Type: Self Drilling Screw Material: Carbon Steel Package List 15Pcs M4.2 x 16 Self Drilling Screw 18Pcs M4.2 x 32 Self Drilling Screw 15Pcs M4.2 x 38 Self Drilling Screw 25Pcs M4.2 x 19 Self Drilling Screw 17Pcs M4.2 x 13 Self Drilling Screw 20Pcs M4.2 x 25 Self Drilling Screw 1 x Storage Box