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Your cart is empty.Stanley J7121 Proto 1/2-inch Square Extension 7/16-inch Hex Made of forged steel. Size stamped on tool for easy identification. Ball detent. Not for use on impact applications.
TW
Reviewed in the United States on January 4, 2025
works well
amin
Reviewed in Singapore on June 21, 2024
the build quality is good, not sure about the hardness. knocking it together on the edge make dent on the hex edges.
Badal Satiesh
Reviewed in the United States on May 19, 2024
Good product
Thomas shuffield
Reviewed in the United States on May 10, 2024
I use this proto tool for Half inch sockets and a Hole auger tool. so I can use it on a Bruit Winder. For large Commercial garage door springs.
Clark C
Reviewed in the United States on December 31, 2024
I use this regularly at work with a half inch drill and 15/16 socket. So I've broken quite a few 1/4" shank adapters. I don't think this one will ever break. I really like the 7/16" shank on this. The locking stud also is appreciated
Tammy
Reviewed in Canada on December 20, 2024
Cheap and works good
Vicky Johnson
Reviewed in the United States on April 13, 2024
Works as should
The Batchelors
Reviewed in the United States on January 21, 2023
Works great! Not sure if it's over time or just the strength of the impact but mine have broken, 2 in the past year or so. I keep a backup just in case it breaks. Still beats paying the other prices.
ala
Reviewed in Canada on January 17, 2023
I used it to open my chevy equinox lug nuts to install winter tires and worked perfectly fine. It gets stuck and does not remove from the wrench easily.
GREG
Reviewed in the United States on April 17, 2023
Very solid base. Much better then expected. Only one I was able to find to prevent twisting of base on impact driver.
white
Reviewed in Canada on July 1, 2022
I use this so that I can use the odd socket to install hardware as a carpender. I do not do automotive so don't know if this is good on cars.
Henry S.
Reviewed in the United States on December 24, 2022
Not sure how to write this so everyone can picture it in their head. But chucked it up into a 7.5 amp low rpm, high torque drill and screwed together 15 30lbs sub-barrels simultaneously, so basically it handled all the torque of spinning 450lbs of steel from 0 to 600 rpm then slamming to a hard stop when the threads made up. The 1/4 bits kept snapping for the same process, so if you have broken a 1/4 socket adapter I would definitely recommend this product.
Ryan
Reviewed in Canada on September 19, 2020
Good and cheap
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