SP Air Corporation SP-1764HD model is a 1/4" super-fast mini impact ratchet wrench. The unit is a reaction free ratchet wrench, so the vibration shock pain from normal air ratchets is not present. Unit specifications include a drive size of 1/4" and bolt capacity of 5/16", a max torque of 55 ft-lbs., a free speed of 700 RPM, a vibration level of 2.4 m/s, and a sound level of 83.6 dB. SP-1764HD was upgraded and increased 30% speed and 30% more power than previous sp-1764. The super-fast mini impact wrench is four times faster than a standard mini ratchet with twice the torque. SP Air Corporation patented reaction-free impact mechanism helps minimize damage to the user’s wrist and knuckles
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