A Quality Tool for Reporting Torque Measurements  and Quality Testing

These digital torque meters provide an easy-to-read torque display and a flash memory card that stores the date, time and torque measurement for each bolt tightened. This information can be downloaded for reporting and quality assurance.

  • Tightening torque measurement works in both clockwise and counter-clockwise directions.
  • Repeatable accuracy (+/-3%)
  • Approximately 10,000 readings powered by 4 AAA batteries.
  • Perfectly suited for rotational capacity testing.



ModelReading RangeFor Use WithLDWeight
DTM5EF80-400 ft-lbTN-20EZ
4 5/8″
117 mm
3 3/4″
95 mm
3.7 lb
1.7 kg
EN100-550 Nm
DTM8EF190-620 ft-lbTN-22EZ
4 5/8″
117 mm
3 3/4″
95 mm
3.7 lb
1.7 kg
EN250-850 Nm
DTM12EF410-920 ft-lbTN-24EZA
4. 7/8″
124 mm
4 3/16″
106 mm
5.3 lb
2.4 kg
EN550-1,250 Nm
DTM21EF620-1,590 ft-lbTN-30EZ
5 1/16″
129 mm
4 1/2″
115 mm
6.6 lb
3.0 kg
EN840-2,160 Nm


GWY has been a global leader in bolt fastening tools since 1975. Our Turn of Nut line of wrenches are custom designed in partnership with the global leader in electric tool companies, TONE. Using our years of experience in bolt fastening with TONE’s years of quality wrench manufacturing, we have created a wrench that meets the high state and federal standards for structural fastening. Our other lines of tools include the popular Shear wrenches for TC bolts, and our torque wrenches for snug tightening, and tensioning hex-head bolts. We also offer calibration repair services, rentals, and spare parts for all the wrenches we sell and some discontinued models. Our goal is absolute accuracy for any bolt fastening project. Call 888.838.6500 for information and pricing.