Ko-ken Tools Z-Series 3/8" Sq.Dr. Flexible Ratchet, Reversible (L=280mm), 72 Tooth
SKU: 79348098899

Ko-ken Tools Z-Series 3/8" Sq.Dr. Flexible Ratchet, Reversible (L=280mm), 72 Tooth

Sale price$108.52 Regular price$120.58
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Description

Ko-ken Tools Z-Series 3/8" Sq.Dr. Flexible Ratchet, Reversible (L=280mm), 72 ToothKo ken Ratchets Ko ken ratchets are known for their very low backlash, small head sizes, and high torque ranges. We designed the new 72 tooth ratchet without compromising on our traditional strengths. The patented design of the 72T combines the low backlash, small size, and has a 10% higher torque limit in comparison to the 36 tooth ratchet. The legacy 36 tooth ratchets move 10 degree click. The new 72 tooth ratchets move 5 degree click. The design

Ko-ken Ratchets

Ko-ken ratchets are known for their very low backlash, small head sizes, and high torque ranges. We designed the new 72 tooth ratchet without compromising on our traditional strengths. The patented design of the 72T combines the low backlash, small size, and has a 10% higher torque limit in comparison to the 36 tooth ratchet. The legacy 36 tooth ratchets move 10 degree/click. The new 72 tooth ratchets move 5 degree / click.

The design changes include moving from the single pawl of the 36 tooth design to the patented dual pawl of the 72 tooth design. The dual pawl 72 tooth design utilizes a single spring. We took four years of testing to perfect the low spring pressure needed to maintain Ko-ken's hallmark low-torque backlash. The finer 72 teeth design creates more surface area contact with the gear; thus, it has a 10% higher torque upper limit.

The 72T is being released in the Z-Series 3/8" ratchets only in 2021. We will be releasing the 72T in sizes, without compromising the body sizes and low backlash as our testing allows. Look for more new product releases in 2022.

Input Drive Size: 3/8"
Drive Shape: Square
Length: 280 mm
Head Type: Flexible Head
Gear Teeth: 72Teeth
Head Thickness: 13.7mm


Product Dimension (Refer Line Drawing Image):

T Size: 24.5mm
D Size: 28mm
H Size: 13.7mm
L Size: 280mm

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 79348098899

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4.1 ★★★★★
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Barry
Boise, US
★★★★★ 3
Chewer was indifferent
Size: 1 Count (Pack of 1)
At first, the two ears I bought were mainly ignored. Now I am seeing teething marks. Took about 2 months for my chewer to stop chewing my wood fence and on these.
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Reviewed in the United States on October 22, 2020
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jKim
Chelsea, US
★★★★★ 4
great chew!
Size: 1 Count (Pack of 1), Size: 1 Count (Pack of 1)
Our dog is a BIG fan of PetQwerks so when we saw this bacon dog chew, we had to try it out! Chews are amazing for hyperactive dogs, dogs with separation anxiety, etc. They keep dogs out of trouble and is great for dental hygiene! Our dog doesn't enjoy getting his teeth cleaned with a toothbrush so we give him lots of chew toys. When we opened up our amazon box, our dog was being so nosy and immediately took to the bone! Awesome chew and we love PetQwerks!
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Reviewed in the United States on September 4, 2018
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Shirlgirl
Belleville, US
★★★★★ 5
It’s a winner!
Size: 1 Count (Pack of 1)
My loves it!
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Reviewed in the United States on November 5, 2025
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Monica Shannon
Houston, US
★★★★★ 5
Good for my puppy...
My puppy loves them.durable . My little guys has some sharp teeth and he hasn't ripped them yet
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Reviewed in the United States on April 22, 2026
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Diane Hesse
Alexandria, US
★★★★★ 5
Best soothing chew toy for puppies yet!
Fantastic products!! Got these for my son’s 10 wk old chocolate lab puppy. He immediately started chewing on one and continued for close to an hour. I wish I had tried these with each of my own labs when they were pups (we’ve had 5 over the past 20 years). Inexpensive and an easy way to keep a determined chewer occupied without food/treats. I highly recommend for a heavy chewing breed like Labradors!!
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Reviewed in the United States on March 29, 2026

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