size:1/16" 5/64" 3/32" 7/64" 1/8" 9/64" 5/32"

   11/64" 3/16" 13/64" 7/32" 15/64" 1/4"

  or 1.5, 2 2.5 3 3.2 3.5 4 4.5 4.8 5 5.5 6 6.5mm

material: hss

manufacture process: roll forged,half ground, fully ground

surface : black finished,bright finished,tin coated,double color finished

package: 20sets/inner box, 2inner boxs/ctn