[NOTE]★Suitable for objects with hardness below 25 HRC, such as carbon steel, thin iron plate, insulation board, PVC board, wood board, etc.★★ Cooling the step drill bit with water during work can effectively extend its service life Titanium Step Drill Bit (1/4'' to 1-3/8'') Drill holes for Plastic, Wood, Steel, Brass, Aluminum, Copper [Specifications]Model: Step drill bit (1/4'' to 1-3/8'')Material: Quality high speed steel 4241Surface Treatment: Titanium coatingShank: 3/8 inch (9.5mm)Step Sizes: 10 sizes- 1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-3/8"Step Height: 4mm [Features]1. Step structure, one drill bit can open a variety of hole sizes2. Small shaking, no walking and center punch in Not Required!3. Deburring, chamfering, open hole reaming, can do the twist drill can not be done4. Both hand-held drills and bench drills can be used5. Two-flute design clears chips faster without chipping and allows particles to escape easily6. Tri-flatted shank fits into power tools chuck securely and eliminates slip [Package Contains]1 * Step Drill Bit (1/4'' to 1-3/8'')
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