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Designed to work on all trumpets, our Straight Mouthpipe Tapered Mandrel and Driver Set quickly removes dents from any straight mouthpipe. Unlike using short barrel shape dent balls that can result in swelling and ridging, our mandrels provide a straight taper over a full 2" (50.8 mm) length, allowing maximum contact area to the mouthpipe.

Each mandrel is precision machined from quality, highly corrosion resistant, magnetic stainless steel, allowing the use of a magnet for mandrel location. Mandrels graduate approximately 0.020" (0.51 mm) in diameter over the 2" length. Diameter sizes range between 0.300" (7.62 mm) and 0.500" (12.7mm), with a slight overlap of several thousandths between mandrels to eliminate
any blind spots.

Stainless steel driver has an overall length of 15" (38mm) and the shaft is made form rust free stainless steel..

The driver and mandrels work by removing the main
tuning slide and inserting the driver into the mouthpiece receiver, extending
the end of the driver beyond the slide receiver. A mandrel is then slid over the
end of the driver and is held in place by a finger tightened retaining screw.
Pull the mandrel back into the mouthpipe up to dent area. Severe dents can be
'roughed' out by pulling hard on driver to force dent up. Finish off using a
dent hammer.

Comes complete with:

• 10 - 2" (50.8mm) Tapered Mandrels


• 1 - Driver


• 1 - Storage Rack