[High quality] The 99Pcs drill bit is made of high quality titanium coated high speed steel (HSS). These drills are sharper than uncoated and oxide coated drills, have a service life, and can drill at a higher speed. Double U-grooves effectively design clear chips [ Widely used ] The 135 angle drill bit is in the middle without a guide hole. The hardness and length of these jobber self centering bits are suitable for most cordless or cordless hand drills and drilling machine applications. Suitable for drilling low carbon steel, aluminum, copper, soft steel, wood and plastic [Size list] 14 different sizes, including 16PCS 1/16 inch, 16PCS 5/64 inch, 15PCS 3/32 inch, 10PCS 7/64 inch, 10PCS 1/8 inch, 8PCS 9/64 inch, 8PCS 5/32 inch, 3PCS 11/64 inch, 3PCS 3/16 inch, 2PCS 13/64 inch, 2PCS 7/32 inch, 2PCS 1/4 inch, 2PCS 5/16 inchand 2PCS 3/8 inch [14 size] 99 piece round handle fried dough twist drills are available in 14 sizes to meet different needs. Material: high speed steel Color as shown Package Contents: 99 x drill bits 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.