This special device helps closing cracks in arched tops or bottoms which are surely clamped in two polyamide jaws. 8 adjustable pads can be individually positioned. The heavy duty construction prevents a shiftig of the wood while gluing which may occur when using single crack clamps.

Material: Zinked steel.

Technical Details: Opening 155 mm (6.1").

Complete set of 6 joining clamps for closing cracks in arched tops and backs. the flat brass material is tension resistant but can be very easily re-bent and adapted to any arched shape. Specially shaped and notched polyamide jaws fit the instrument exactly and carefully, the material is glue-repellent.


Material: Brass 

Technical Details: Span widths: 300-370 mm (11.8"-14.6") / 360-430 mm (14.2"-16.9") / 400-470 mm (15.7"-18.5") / 440-510 mm (17.3"-20.1") / 580-650 mm (22.8"-25.6") / 610-680 (24"-26.8") mm.

Set of 4 joining clamps for closing cracks in (flat) tops and backs, shaped and notched polyamide jaws swivel on nickel-plated steel spindles to conform to nonparallel edges.

Material: Polyamide, nickel-plated steel 

Technical Details: Adjustment: 365-460 mm (14.4"-18.1") / 455-580 mm (14.9"-22.8") / 550 - 675 mm (21.7"-26.6") / 625-750 mm (24.6"-29.5").

Strong mini-clamp for positioning wooden patches through the f-hole when reparing cracks in violins or mandolins without removing the top. The patches are lightly glued to the clamp and then positioned for clamping in place.

Material: Zinked steel 

Technical Details: Opening 22 mm (0.87"), depth 80 mm (3.15").

Set of 4 joining clamps for closing cracks in (flat) tops and backs ofstringed instruments, shaped and notched polyamide jaws swivel on nickel-plated steel spindles to conform to nonparallel edges.

Material: Polyamide, nickel-plated steel 

Technical Details: Opening: 65-140 mm (2.6"-5.5") / 90-170 mm (3.54"-6.7") / 155-235 mm (6.1"-9.25") / 105-185 mm (4.1"-7.3").

Set of 4 joining clamps for closing cracks in (flat) tops and backs, shaped and notched polyamide jaws swivel on nickel-plated steel spindles to conform to nonparallel edges.

Material: Polyamide, nickel-plated steel 

Technical Details: Adjustment: 165-310 mm (6.5"-12.2") / 275-370mm (10.8"-14.6") / 315-410 mm (12.4"-16.1") / 365-460 mm (14.4"-18.1").

This double screw miniature clamp is despite of its small size very sturdy and is used with the repair of stringed instruments. It is for example ideal for edge repairing. It is also suitable for repairing works at the sound hole (second pad screw with guide)

Material: Brass 

Technical Details: Opening 13 mm (0.51").

Infinitely adjustable peg shaper for exact adaption of pegs. Due to the large adjusting range this tool is also suitable for peghole enlargement or historic instruments.

Technical Details: Cone tapering 1:23, length 83 mm (3.3").

Special tool for removing stucked mouth pieces.