The finest quality HSS steel. True engineering quality. This drill bit set has been fully ground and heat treated for strength and durability. Fully ground bits are machined from a single bar and are far superior to a normal roller or twist bit. are also much more expensive to manufacture. These have a working capacity and use an aggressive 135 degree split point. This set also comes with a handy custom-made carrying case so you can keep them organized in their correct positions and tidy. Starting at 1 mm, drill bits increase in size in 0.1 mm increments Hss 135 Split Point Color: Silver Ground High Speed Steel (HSS) General purpose for wood, metal and plastics Sizes from 1 mm to 6 mm in 0.1 mm increments Package Includes: 102 x Drill Bits 2 x Box (Random Color, Cannot Choose Color) Only the above package content, other products are not included. Other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little