Our oblique eccentric drill bit is made of high quality steel material, which is very sturdy and can be used repeatedly. It is wear- and . Our drill bits are not prone to deformation under natural conditions, so you can use them with confidence. The package includes sizes of 6mm, 8mm, 10mm and 12mm, from very small to very large, which can meet your different needs. This drill bit adopts oblique design. It has cutting edges on both the tip and the groove for cutting threads. It can be used with hand drill or electric drill to processing threads. It is designed for drilling holes in wood, plastic and metal. It is easy to use and the is designed for quick and easy cutting. The polished is and burr-free, making the threads smoother. It can be used for metal, wood, plastic and composite materials. This oblique eccentric drill bit is made of steel material, which is sturdy and can be used for drilling holes in wood, plastic and metal. It is easy to use and you can use it with confidence. Wear-Resistance: Our oblique eccentric drill bit adopts premium material to wear-resistance. It can be used with hand drill or electric drill to processing threads. Durability: Our drill bits are not prone to deformation under natural conditions, to use. The is designed for quick and easy cutting. Product Name: Oblique Eccentric Drill Bit Set Size: 6mm+8mm+10mm+12mm Total length: 10cm Drilling depth: 5cm Shank diameter: 6.3mm Manual measurement may have 1-3cm error Colour:Silver Material:high speed steel Package Contents: 1 set x twist drill bit set Only the above package content, other products are not included. Note: Light reflection 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.