13 PCS Impact Driver Set
Premium quality, Chrome vanadium handle, 13 PC Manual Impact Driver Set, made-in-China
S2 alloy steel bits
Set included:
1 Pc 1/2" Dr. Impact driver with a bit holder(1/2"x 8mm hexagon).
10 Pcs 36mm long Bits:
PH1, PH2, PH3, PH4.
SLOTTED 5mm, 6mm, 7mm, 8mm.
H6, H8,
2 Pcs 80mm long Bits:
PH3, SLOTTED 8mm.
Metal box with our brand name
With color sleeve
20 sets per carton
G. W.: 21 5KG
N. W.: 21KG
An impact driver is a tool that delivers a strong, sudden rotational and downward force. In conjunction with toughened screwdriver bits and socket sets, they are often used by mechanics to loosen larger screws (bolts) and nuts that are corrosively "frozen" or over-torqued. The direction can also be reversed for situations where screws have to be tightened with torque greater than a screwdriver can reasonably provide.
Manual impact drivers consist of a heavy outer sleeve that surrounds an inner core that is splined to it. The spline is curved so that when the user strikes the outer sleeve with a hammer, its downward force works on the spline to produce turning force on the core and any socket or work bit attached to it. The tool translates the heavy rotational inertia of the sleeve to the lighter core to generate large amounts of torque. At the same time, the striking blow from the hammer forces the impact driver down into the screw reducing or eliminating cam out. This attribute is most beneficial for Philips screws which normally cam out as part of their design. It is less beneficial for flat head, also known as common, screws and is not beneficial at all for most other types.
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