Specifications:
Material:HSS 4241
Shank :1/4 Hexagonal
Surface treatment: titanium
Tools: pistol drill, bench drill.

Features:
Type: 3-13MM (11 steps:3, 4,5,6,7,8,9,10,11,12,13MM)
4241 high-speed steel, used in hardness under 25 ¡ã workpiece, the plate thickness under 5 mm. such as carbon steel plate, sheet iron, insulation boards, wood. Cannot be used for stainless steel.
When inject cold water while working, can effectively extend the service life of the drill bit.

Package Included:
1x 3-13mm Stepped drill

• 4241 high-speed steel, used in hardness under 25 ¡ã workpiece, the plate thickness under 5 mm. such as carbon steel plate, sheet iron, insulation boards, wood. Cannot be used for stainless steel.
• The ladder of its unique structure, a bit can open a variety of specifications of aperture.
• Deburring, chamfering, elliptic hole enlargement, twist drill, the function of them was unable,but it is possible.
• Do not need to use center punch, compared with the ordinary twist drill is not easy to be broken.
• Used on drilling, bench drill.Work while water cooling, can effectively extend the service life of drill bit.

4241 high-speed steel, used in hardness under 25 ¡ã workpiece, the plate thickness under 5 mm. such as carbon steel plate, sheet iron, insulation boards, wood. Cannot be used for stainless steel.QST EXPRESS