1) Product: Multi-purpose drill bit
Cobalt and tungsten carbide tip, chrome vanadium steel shank
To drill holes on hardened steel, ceramic tile, marble, plastic, cast iron, concrete, porcelain, glass, and woods etc.
2)Straight shank of Multi-purpose drill bit for cutting metal sheet
3)Reduced shank multi-purpose drill bit
4)Skinned card for multi-purpose drill bits
5/32" 3-1/4" Straight
3/16" 3-1/2" Straight
7/32" 3-3/4" Straight
1/4" 4-1/4" Straight
9/32" 4-3/8" Straight
5/16" 4-1/2" Straight
11/32" 5" Straight
3/8" 5-15/16" Straight
13/32" 6-1/4" Straight
7/16" 6-1/4" Straight
15/32" 6-1/4" 3/8"
1/2" 6-1/4" 3/8"
9/16" 6-1/4" 3/8"
5/8" 6-1/4" 3/8"
3/4" 6-1/4" 3/8"
7/8" 6-1/4" 1/2"
7) Drilling Instruction
Please follow the speed and technique instructions below
Hardened Steel and Iron 2000—4000 RPM (Lubricant)
Masonry/Concrete 2000—4000 RPM (Percussion)
Stainless Steel 1500—2500 RPM (Coolant)
Glass/Tile/Granite 300—600 RPM
Plastic and Laminates 300—600 RPM
Solid Surface Materials 300—600 RPM
Wood and Composite 500—1000 RPM
