Description Set of sockets for removing studs (4 pcs.) QUATROS QS12048
QUICKSTER PROFESSIONAL
Set of 4 stud removal heads
6-12 mm with internal rollers
Professional set for quick removal and installation of studs in hard-to-reach places.
Article: QS12048
Functional purpose
Specialized heads with internal rollers for reliable gripping and unscrewing of studs, broken bolts and screws.
Double-sided action
Three internal rollers securely grip the stud in both directions – for unscrewing and tightening.
Technical specifications
| Sizes | 6, 8, 10, 12 mm |
| Drive | 1/2" internal square and 21 mm external hexagon |
| Steel | 50BV30 |
Description QS12048
The QS12048 stud extractor set is a professional tool for workshops that work with damaged or hard-to-reach studs. This stud extractor set includes 4 heads in sizes 6, 8, 10 and 12 mm with internal rollers that securely grip the stud. Suitable for right-hand and left-hand threads.
Trying to unscrew a broken stud with ordinary pliers or a wrench often leads to slipping, thread damage and the inability to complete the job. The QS12048 completely solves this problem: three internal rollers firmly grip the stud when rotating in any direction; the special design allows you to work with protruding parts from 6 to 12 mm, and two types of drive (1/2" and external 21 mm) ensure compatibility with various tools.
Technical specifications
| Size | Maximum torque |
| 6 mm | 20 Nm |
| 8 mm | 20 Nm |
| 10 mm | 33 Nm |
| 12 mm | 33 Nm |
⚠️ Important: Do not exceed the maximum tightening torque! For 6 and 8 mm – 20 Nm, for 10 and 12 mm – 33 Nm. Exceeding may result in damage to the head.
Set Contents
| Position | Size | Drive |
| Head for studs | 6 mm | 1/2" and wrench 21 mm |
| Head for studs | 8 mm | 1/2" and wrench 21 mm |
| Head for studs | 10 mm | 1/2" and wrench 21 mm |
| Head for studs | 12 mm | 1/2" and wrench 21 mm |
When to use this set
- For unscrewing broken studs with a diameter of 6–12 mm protruding above the surface.
- When dismantling and installing studs of manifolds, cylinder heads and other components.
- For working with studs with right and left threads.
- In hard-to-reach places where it is impossible to use two nuts.
- For quick installation of new studs without damaging the thread.
Advantages of QS12048
Roller grip
Three internal rollers ensure a secure grip on the stud without slipping in both directions.
Universal Drive
1/2" square drive and 21mm hex drive for use with a variety of tools.
Durable steel
Made from 50BV30 chrome vanadium steel for durability and wear resistance.
FAQ
Can the heads be used with left-hand threads?
Yes, the heads work with both right-hand and left-hand threads thanks to the roller mechanism.
What is the minimum length of the protruding part of the stud?
The stud must protrude above the surface enough for the rollers to grip. The recommended minimum length is approximately 10-15 mm.
Are the heads suitable for broken bolts?
Yes, the heads are designed to remove broken studs and screws with a diameter of 6 to 12 mm.
What is the warranty for the QS12048 set?
The tool is guaranteed for 12 months against manufacturing defects, provided compliance with maximum tightening torques.
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