Features:

1. Firm And Multipurpose --- These triangle handle drill bits are made of good quality hard alloy, Surface anti-rust treatment,Smooth and sharp without burrs with reinforced head prevent bit cracking and provide longer life,.Strong carbide tip with spear pointed design can easily drill through various materials like tile, concrete, brick, glass, plastic, wood and other materials.



2. 5Pcs Drill Bit Set Include Daily Frequently Used Specifications--- 2x 6mm(1/4"), 1x 8mm(5/16"), 1x 10mm(3/8"), 1x 12mm(1/2"). Set comes with durable plastic case for safekeeping.Applicable Equipment: hand drill, electric drill, bench drill.



3. Quality Design --- Spiral chip removal design,U-shape groove allow for effective scraps and heat discharge. smooth without burr, reduces the friction coefficient and improves the surface hardness of the drill.higher efficiency, Tri-flat on the shanks of drills are constructed for tighter chucking maximizing security for precise holes.



4. Fast and Efficient Drilling --- Special triangle head, high hard ness, sharp and durable,Spear pointed design strong tungsten carbide tip can easily penetrate various material and reduces breakout.Triangle processing can effectively prevent slippage when working to ensure smooth movement of chips.



5. Wide range of applications --- Concrete drill bit set is suitable for most general drill, electric drill, hand drill and bench drill.drill bits for metal are suitable for DIY, home, construction and daily work. They are used in conjunction with drills to drill holes in metals, stainless steel, titanium alloys, aluminum, hard plastics, copper, concrete, brick, glass, plastic, wood, etc.

Specification:

• Category: Hole expansion drill



• Material: Hard Alloy



• Color: As shown in the pictures



• Tool Holder Type: Triangle Handle



• Cooling Type: Outer Cold



• Multiple Sizes: 2x 6mm(1/4"), 1x 8mm(5/16"), 1x 10mm(3/8"), 1x 12mm(1/2").



• Handle Diameter: 5-9mm



• Blade Length: 100-125mm



• Working length: 60-77mm



• Quantity: 5pcs