6 metric cobalt step drill set perforated aluminum housing with center punch

Name Step drill 5PC+center punch
Item No.: 6PC step drill straight groove aluminum box with center punch 3015A
Shank triangle round shank
Material High-speed steel 4241: suitable for workpieces below 25, such as carbon steel, iron plate, steel plate)
Packing sleeve/aluminum box
specification
Step drill 3/16-1/2” (3/16, 1/4, 5/16, 3/8, 7/16, 1/2)
Step drill 1/8-1/2”(1/8,5/32.7/32.1/4,9/32,5/16,11/32,3/8,13/32,7/16,15/ 32,1/2mm)
Step drill 1/4-3/4” (1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4)
Step drill 3/16-7/8” (3/16, 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/ 4, 13/16, 7/8)
Step drill 1/4-1-3/8” (1/4, 3/8, 1/2, 5/8, 3/4, 7/8, 1, 1-1/8, 1-1/ 4,1-3/8)
Box size: about 16*17*4CM
Weight: about 600g
DIY Supplies : ELECTRICAL
Origin : Mainland China
Certification : NONE