Long Masonry Drill Bit Set Manufacturer,Supplier and Exporter in India
Product Code : EL-WT-12986
Jlab Export is a leading Long Masonry Drill Bit Set Manufacturer,and suppliers in India
A 12 inch masonry bit reaches deep into brick and block, far enough to take a hole through a thin wall for a cable, pipe or bolt. This set has 10 long bits in five sizes from 3/16 to 1/2 inch. Four are 1/4 inch, and the 3/16 and 5/16 inch sizes come in pairs.
Specifications
| Pieces | 10 |
| Length | 12 inch |
| Sizes | 3/16, 1/4, 5/16, 3/8 and 1/2 inch |
| Bits per size | 2 of 3/16, 4 of 1/4, 2 of 5/16, 1 of 3/8 and 1 of 1/2 inch |
| Minimum order quantity | 10 units |
| Dispatch time | Usually 4–6 working days |
| Manufacturer | JLab (Jain Laboratory Instruments Pvt Ltd), Ambala, India |
Workshop Practice: Drilling Through Walls
On a training wall, electrician trainees bring a cable from one room into the next. They mark the cable route level with the Levels. The hole position is measured from a corner on both faces with the Tape Measure, so the hole comes out where it should. The hole is then drilled with a long bit in a hammer drill.
Plumbing classes drill through for a waste or overflow pipe, starting with a smaller bit and opening the hole up. Teachers can show how dust packs the flutes unless the bit is pulled back now and then. They can also show how the far face breaks out when the last part is drilled hard.
Frequently Asked Questions
Why choose a long masonry bit?
A standard masonry bit stops short in a thick wall. The 12 inch bits reach far enough to drill deep fixing holes and to pass a cable or pipe through a partition or thin wall.
How do I stop the far face breaking out?
Ease the pressure and turn off hammer action just before the bit breaks through. For a neat hole on both faces, measure the position on each side and drill halfway from each face.
How do I keep a long hole straight?
Start square to the wall and check the drill from above and from the side. Do not lean on the drill or lever the bit, because a long bit bends and can jam or snap in the hole.
Do the long bits need hammer action?
In hard brick and concrete, yes. Let the hammer action do the work with steady, moderate pressure, and pull the bit back every so often so the dust can escape up the flutes.
Other Masonry Bits and Long Drills
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Last updated: 6 November 2026