text: 1pcs/3pcs HSS Spiral Grooved Step Cone Drills Bits Set Hole Cutter Tool 4-12/20/32mm | Wish
  Items are sold and shipped by Whpop
  Specification: Material: high speed steel Color: golden, as picture shows Quantity: 1pcs/3pcs #1 size: 4mm to 12mm 9 steps (4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm), 7cm(L) #2 size: 4mm to 20mm 9 steps (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm), 7cm(L) #3 size: 4mm to 32mm 15 steps (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm), 10cm(L) Drop forged, heat treated, high speed steel, fully polish Take the guessing out of drilling by supplying the proper depth for you Use for home and industrial When drill the hardness and larger diameter hole, must cooling the bit with cool water, recommend the drilling rate for 120-240 is suitable for processing 6mm and below plate, the bits are high speed steel material, drilling rate are 120/minute, expanding to more than 20 mm hole, drilling rate shall not be higher than 400 RPM and used water cooling Package included: 1pcs/3pcs x spiral grooved step drill Note: Please allow 0.5-1cm errors due to manual measurement Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same
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