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5pcs magnetic screwdriver s2 alloy steel double-headed cross drill bit set. item details: 100% brand new and high quality. it is made of high-strength s2 chrome-plated alloy steel and is extremely durable. suitable for installation in pneumatic screwdrivers, electric screwdrivers, rechargeable electric drills, and wind bits.

As a rule of thumb, the smallest hole diameter a dth hammer can drill is its nominal size. i.e. standard 102 mm (4”) hammer will drill a hole down to a minimum diameter of 102 mm (4”). the limiting factor is the outside diameter of the hammer, because as the hole diameter reduces due to diameter wear of the bit, airflow is restricted.

Dth drill hammer, dth hammer, dth drilling tools manufacturer / supplier in china, offering super quality 6 inch dth hammer for rock drilling, xrvs1050 / xrhs1150 portable mobile air compressor, xats1050 portable diesel air compressor for construction work and so on.

The optimum range of hole size for dth drilling is 90 mm (3.5”) to 254 mm (10”). smaller holes are generally drilled using tophammer drill rigs, and larger holes generally use rotary drill rigs. as a rule of thumb, the smallest hole diameter a dth hammer can drill is its nominal size. i.e. standard 102 mm (4”) hammer will drill a hole down to a minimum diameter of 102 mm (4”).

We attach value to innovation, especially with patents of China on Best seller Down the hole Bits, its superb technology has reached the international sophisticated level, and has a high reputation within the Best seller Down the hole Bits industry. Our group not only has excellent researchers and business nationwide sales and service network, but additionally are China shoppers specified brand companies.


Best seller Down the hole Bits Supplier having a higher company reputation,from China.Our items involve:Best seller Down the hole Bits Merchandise are mainly exported to European nations,it really is well-known in several nations.

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