WELLOCKS Self Drilling Screws M4.2 Pan Head 13-50Mm Length Stainless Strong Tek Screws Self Driller Assortment Kit Set With Storage Box For Attaches Sheet Metal Steel 187 Pcs (D136) Review

【MATERIAL】 Stainless steel includes Austenitic&Martensitic; MartensiticSS is commonly used for screws like 440C or 410 because these can be heat treated for higher strength with proper range of carbon element. The carbon element of stainless steel is magnetic; TO USE MANGET TESTING FOR STAINLESS STEEL IS NOT RIGHT. Stainless Steel sticks to magnets more or less depending on the percentage of carbon and even the contamination from production carbon element might be magnetic. 【WONDERFUL HOLDING POWER】The pan head self-Drilling screw with deep thread design is durable and sturdy that can provide good holding power in different materials, achieve the effect of connecting and fastening. It can achieve the effect of connecting and fastening. They are perfect accessories for homemade woodwork. 【STORAGE BOX】The 187 piece set comes packaged in a handy plastic organizer case with compartments for easy storage and in case of losing. With a hole on the box, you may hang it away. It’s a must-have for any utility toolbox. 【THE KING OF QUALITY】Adopt the stronger material 100% 410 stainless steel corrosion resistance and anti-rust in wet environment that can be stored for a long time, high in strength, non-deforming. This screws assortment are mainly used in metal, wood, or plastic, and commonly have a strong self-drilling point that helps penetrate the material. 【MULTIFUNCTIONAL IN DAILY LIFE】 Wood screws are widely used at home and office like furniture repair, application repair, homemade and home installation. We have researched the common used size like M4.2 at home in our daily life, and make them into a mix-sizes box, so this screw assortments can meet your daily needs. When you need to repair your door or install your new book shelf, you cannot find a piece of spare screw that will drive you crazy.