Features: 1. Provide fast and precise cuts into stainless steel sheet metal FRP and wood. 2. Made of high quality steel carbide good sharpness and resistance to cutting. Have good perforation capability. 3. Long enough can process the thick steel plate and the thick-walled metal pipe material perforation. Smooth cuts with perfect cutting result. 4. When cutting Chilled materials cutting edge should be filling cooling liquid. 5. Can be clamped on hand drill and bench drill can be used for thick steel plates cast iron stainless steel non-standard angle iron and other metal open hole. Notice: 1. Actual color may be slightly different from the image due to different monitor and light effect. Please allow slight deviation due to manual measurement. Specification: Type: Drill Bit Set Material: Steel Carbide Size: 3PC:25mm/50mm/75mm 5PC:16/18/20/22/25mm 6PC:22/30/35/45/50/65mm 10PC:16/18/ 19/ 22/ 25/ 30/ 35/ 42/ 50/53mm 11PC:20/22/25/30/35/38/45/50/60/65/75mm 13PC:16/18/20/22/25/26/28/30/35/40/45/50/53mm Include: 3pcs/5pcs/6pcs/10pcs/11pcs/13pcs optional includes: Choice 1: 3 x Drill Bit Set Choice 2: 5 x Drill Bit Set Choice 3: 6 x Drill Bit Set Choice 4: 10 x Drill Bit Set Choice 5: 11 x Drill Bit Set Choice 6: 13 x Drill Bit Set "