Tone® & Makita® TC Bolt Wrenches & Accessories

GWY, Inc. has a complete line of wrenches, for the installation of TC Bolts. Both electric and manual tools are available to satisfy the most difficult TC Bolt applications. All models are in inventory and are available for same day shipment, worldwide.

We also have a comprehensive stock of spare parts and accessories for all TC Wrench models. Like the tools, these parts and accessories can be shipped worldwide the same day the order is received.

Tone® Torque Control and Turn of Nut Wrenches & Accessories for Hex Head Bolts

GWY, Inc. maintains a large stock of constant speed non-impacting electric wrenches which are designed to accommodate all four bolt installation methods that have been approved by the RCSC, AISC, CISC & AASHTO:

  1. Snug tightening
  2. Calibrated wrench tightening
  3. Turn of nut tightening
  4. DTI tightening

Since our beginning in 1976 GWY has been the global leader specializing in the sales, rental and repair of TC Wrenches for Tension Control Bolts (TC Bolts).

To satisfy the requirements of hex head bolt users, Electric Torque Control Wrenches (STC Series & SR Series) and Torque Multipliers for standard Hex Head Bolts were added to our product line in the 80s.

Realizing the increased demand for "Turn of Nut" applications, GWY introduced the TN Series wrenches for bridge and steel construction in 2005. The TN (Turn of Nut) Series wrenches use the "Angle of Rotation" method of tensioning bolt assemblies - rather than torque.

In 2008, we complemented our line of tools with the addition of a digital torque indicator and new for 2010, we are introducing a new manual torque multiplier.

GWY, Inc. is recognized for quality, dependability, technical expertise, as well as:

  • Same day service
  • A large inventory available for sale & rental
  • A large parts inventory
  • Parts for all Tone & Makita TC Wrenches (Shear Wrenches)
  • Worldwide sales

To place an order, or for additional information, contact GWY, Inc. customer service at:

P.O. Box 293; 217 Forest Road, Greenfield, NH USA 03047
Toll-free: 1-888-838-6500
tel: 603-547-3800
fax: 603-547-3801

Service &
Product Videos

GWY, Inc. is America's leading source for rentals, sales and service of TC wrenches, torque wrenches and turn of nut wrenches.

Same day service for most repair work.

Same day shipping anywhere in the world on new products, rentals and parts.