1. concrete drilling should use impact drilling special twist bit, cutting edge for hard alloy.

2. impact drill depends on rotation and impact to work. A single shock is very slight, but a frequency of more than 40,000 shocks per minute can produce a continuous force. Can be used with natural stone or concrete.

3. There is an adjustment knob at the bit collet when the impact drill is working. It can be adjusted by two ways: ordinary electric drill and impact drill. But the impact drill is to use the inner shaft of the gear beat each other to achieve the impact effect, the impact force is far less than the electric hammer. It is not suitable for drilling reinforced concrete.

Description:

Product Name	high quality Electric hammer drill set 12 pcs (9pcs hammer drill+3 pcs chisel)
Material	YG8,YG8C,YG6X
Diameter	1-20mm,1/16'' - 1/4'',customized
Standard	/
Color	Titanium Coated, bright finish, black oxide, rainbow, amber finish etc.
Package	Plastic box,opp bag,metal box,plastic tube
MOQ	1pc for sample testing
	200pcs for mass production
Delivery time	15~45 days, according to order quantity
Application	Copper, iron, stainless steel, aluminum
Payment terms	T/T, D/P, L/C, Paypal, Western Union, ect.
Certificated	BSCI
Unit price	Contact us to get latest price (Larger quantity, more discount)

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