Home > Best quality and lowest price in China 9 7 8 39 39 251mm 3 wings step drag bit

Dth hammers and bits ams stocks a wide range of down the hole (dth) hammers ranging from 4 to 8 inch in diameter. we also carry a wide variety of dth bits in numerous shank sizes and can custom make any type of bit to suit all drilling requirements.

Use one hand to hold the drill bit in place. tighten the jaws of the drills chuck by turning the metal chuck key with your other hand in a clockwise manner. tighten the chuck jaws as firmly as possible. remove the chuck key, and take your hand off the bit. test the drill to see if it is drilling properly.

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Wholesale: $62.16 / each qty add product attributes contents (9) masonry drill bits 5/32" x 4-1/2" bit, 3/16" x 4-1/2" bit, p2 insert bit, p3 insert bit, hex head allen wrench, sleeve, drill bit holder, 5/16" hex screw setter, 1/4" hex screw setter, brute tough case ... the bosch tc900 concrete screw drill bit set …

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