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4.1/9.5 is called the Mini DIN, a scaled down version of the 7/16 & only needs 90 in-lbs of torque vs 221+ for a 7/16. The 4.3/10 requires even less Torque, 44 in-lbs. Both 4.1-9.5 and 4.3-10 torque wrenches use a 22mm Hex.
Calibration Certificates: We outsource our torque wrenches. Some don’t have any cal certificate (ex Huber Suhner 74Z-0-0-21, our CT-SMA8C, etc). Some come with a certificate which is dated because its been on the shelf for awhile (CT-516-8 etc). All parts are tested 100% in ISO9000 certified facilities. Should you need a current Cal Certificate, we can have this done at a local lab; $60 ea, 2 weeks; see product at bottom of each page to order.