Pro TorqKeys - T-Handle Torque-Limiting Bits Tool

Proven at the Highest Level of Cycling

Trusted by professional race mechanics—including Tudor Pro Cycling—the Pro TorqKey is designed for the fast, repeatable torque verification required during bicycle assembly, race preparation, and routine service. Its simple preset operation allows mechanics to work quickly while maintaining consistent torque on critical fasteners.

Fast, Repeatable Torque

• Factory preset to deliver accurate, repeatable torque every time.
• No torque adjustment required before use.
• Simply tighten until the tool provides mechanical overrun feedback, then stop.
• Automatically resets after every use for fast, repetitive service.

Patented Torque-Limiting Technology

• Patented ball-bearing spring-release mechanism provides unmistakable tactile feedback when preset torque is reached.
• Internal spring design resists calibration drift, eliminating routine recalibration.
• Safe for tightening and unscrewing without affecting calibration.
• Factory calibrated for long-term accuracy and reliability.

Built for Professional Service

• Ergonomic four-finger T-handle provides exceptional comfort and control.
• Compact, low-profile design reaches fasteners in confined spaces.
• Heavy-duty zinc alloy shaft is engineered for demanding workshop use.
• Impact resistant to drops exceeding 10 ft (3 m) without damage or loss of calibration.
• Magnetic bit holder allows fast, secure bit changes.

Designed for Speed

• Color-coded lower handle allows instant identification of torque value on the workbench or in the toolbox.
• Compatible with all standard 1/4" hex bits for outstanding versatility.
• Ideal for bicycle assembly, race preparation, routine service, and pre-ride safety checks.

Professional Confidence

• Helps prevent over-tightening of lightweight carbon and alloy components.
• Eliminates the variability of hand tightening.
• One simple tool delivers consistent, repeatable results from the first fastener to the last.

Product Information

Product Type: Preset Torque-Limiting T-Handle Bit Driver
Product Category: Torque Tools
Family: Pro TorqKeys
Variations: 4Nm, 5Nm, 6Nm, 7Nm, 8Nm, 10Nm, 12Nm
Manufacturer: Prestacycle
Brand: Prestacycle
SKU: 77104/77105/77106/77107/77108/77110/77112
EAN: 0689466771053
UPC: 689466771053
Country of Origin: Taiwan
Country of Design: USA
Warranty: 1 Year

Torque Performance

Torque System: Preset Torque Limiter
Torque Limiting Method: Internal Torque-Limiting Mechanical Overrun
Preset Torque Setting: Factory Set
Preset Torque Adjustable: No
Torque Units: Nm
Torque Accuracy: ±6%
Torque Release Feedback: 20° Mechanical Overrun
Torque Limiting Reset: Automatic
User Adjustable: No
User Calibration Required: No
Calibration Method: Factory Calibrated
Calibration Stability: Spring Design Prevents Calibration Drift
Rated Torque Cycles: 5,000+

Operation

Clockwise Operation: Torque Limiting
Counterclockwise Operation: Free Rotation (No Torque Limiting)
Safe for Unscrewing: Yes
Maximum Unscrewing Torque: 25 Nm
Routine Maintenance: None Required

Construction

Handle Style: Ergonomic Four-Finger T-Handle
Handle Material: ABS Polymer
Handle Grip: Four-Finger Ergonomic Grip
Shaft Material: Heavy-Duty Zinc Alloy
Shaft Diameter: 10 mm
Impact Resistance: Withstands Drops Exceeding 10 ft (3 m) Without Damage or Loss of Calibration
Finish: Color-Coded Lower Handle for Easy Torque Identification
Handle Color: Orange
Shaft Color: Grey with Laser Logo

Drive & Compatibility

Drive Interface: Standard 1/4" Hex
Bit Retention: Magnetic Bit Holder
Compatible Bit Standard: Standard 1/4" Hex Bits
Compatible Bit Types: Hex, Torx, Security Torx, Phillips, Pozidriv, Flat Blade, 1/4" Sockets (with Optional Adapter), Any Standard 1/4" Hex Bit
Compatible Accessories: Round 6-Bit Carrier, All Prestacycle 1/4" Hex Bit Sets, Prestacycle Extensions, Prestacycle Socket Adapter

Included Items

Included Bits: None
Extension Included: No
Bit Storage: None
Carrying Case Included: No
Optional Storage Accessory: Round 6-Bit Carrier (Fits Tool Shaft)

Applications

Primary Application: Bicycle Assembly and Service
Bike Compatibility: Road, Gravel, MTB, BMX, Cyclocross, Commuter, Touring, E-Bike
Assembly Required: No
Torque Function: Yes
Ratchet Function: No
Fast Tightening: Yes
Fast Loosening: Yes
Precision Final Tightening: Yes
Stem Bolts: Yes
Handlebar Clamp Bolts: Yes
Seatpost Clamp Bolts: Yes
Brake Rotor Bolts: Yes
Brake Lever Clamp Bolts: Yes
Derailleur Clamp Bolts: Yes
Bottle Cage Bolts: Yes
Accessory Mount Bolts: Yes
Pedal Installation: No
Pedal Removal: No
Cassette Lockring: No
Bottom Bracket Cups: No
Crankarm Axle Bolts: NoRecommended Use: Road, Gravel, MTB, Cyclocross, BMX, Commuter, Touring, E-Bike
Professional Shop Use: Yes
Home Mechanic Use: Yes
Travel Use: Yes
Ride Kit Use: Yes

Dimensions & Weight

Overall Height: 64.5 mm (2.5 in)
Overall Width: 81 mm (3.19 in)
Overall Depth: 24.75 mm (1 in)
Dimensions (Imperial): 2.5 × 3.19 × 1 in
Tool Weight: 66 g

Service & Support

Replacement Parts Available: Replacement Bit Sets
Storage Recommendation: Dry Environment
Patent Status: Patented
Primary Technology: Ball-Bearing Spring-Release Torque-Limiting Mechanical Overrun
Intended User: Professional Mechanics, Home Mechanics, Mobile Mechanics, All Cyclists, Race Support Mechanics
Packaging Type: Sealed Poly Bag

Specifications subject to change without notice. Prestacycle continually improves products and reserves the right to update specifications without prior notice.

Disclaimers

Check with the manufacturer of your components and fittings for proper torque specifications. Always follow Manufacturer guidelines for installation and removal of nuts, bolts and screws.

California Proposition 65 Warning

This product can expose you to chemicals including Nickel (Metallic), Lead, Diisononyl Phthalate (DINP), Urethane (Ethyl Carbamate), 1,3-Butadiene or Styrene, which is known to the State of California to cause cancer or reproductive harm.

For more information, go to www.P65Warnings.ca.gov.

Prestacycle Statement:

• Products made with Stainless or Plated Steel contain Nickel (Metallic).
• Products made with Brass contain Federally accepted trace amounts of Lead.
• Most soft Plastics including Vinyl contain Diisononyl Phthalate (DINP) .
• Buna Rubber contains1,3-Butadiene and Styrene.

Prestacycle manufactures it’s products with these materials as they are the highest standard available to manufacture these products to suit their purpose. Prestacycle does not dispute any of the findings made by California or the Federal Government. The health and safety of our customers is very important to us. We will always take every step possible to insure our products are as safe as possible.

Prestacycle warrants all Prestacycle torque tools to be free of defective material or workmanship for 1 years, and under the conditions stated herein. This warranty does not apply to standard wear items such as tool ends and tool bits. This warranty is expressly limited to repair or replacement of product found to be defective. Prestacycle assumes no liability for loss due to failure of any product to perform satisfactorily. Prestacycle makes no other warranty, expressed or implied, except that of title. Any and all other warranties are expressly disclaimed.

This warranty applies under conditions of intended use and is exclusive of equipment subjected to: Failure to follow recommended assembly and service procedures, Lack of proper maintenance, excessive duty cycle, exposure to the elements, shipping damage and modification not authorized by Prestacycle. No warranty claims will be honored without prior authorization for repair from Prestacycle. Any replaced or repaired equipment will be warranted for the remainder of the warranty term only.