This form clamp is mainly used for the instrument manufacture for gluing on the top or bottom. Hard wood jaws lined with soft PVC, thread integrated in the grip, nickle-plated steel spindles with "fast" 1/4 inch thread (ca. 42 pieces for one body)

Material: Hard wood 

Technical Details: Opening 140 mm (5.5").

This single form clamp is especially used for the instrument manufacture. Distortion-resistant jaws made from hard plywood and lined with soft PVC distribute the pressure equally. They are guided by steel pins which avoid a shifting of the jaws and thus guarantee that the jaws press the parts together in a way that they match properly.

Material: Hard ply-wood 

Technical Details: Opening 60 mm (2.36").

This single form clamp is especially used for the instrument manufacture. Distortion-resistant jaws made from hard plywood and lined with soft PVC distribute the pressure equally. They are guided by steel pins which avoid a shifting of the jaws and thus guarantee that the jaws press the parts together in a way that they match properly.

Material: Hard ply-wood 

Technical Details: Opening 205 mm (8.1").

This single form clamp is especially used for the instrument manufacture. Distortion-resistant jaws made from hard plywood and lined with soft PVC distribute the pressure equally. They are guided by steel pins which avoid a shifting of the jaws and thus guarantee that the jaws press the parts together in a way that they match properly.

Material: Hard ply-wood 

Technical Details: Opening 275 mm (10.8").

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").

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").

Clamp with precise double guide for drawing cracks together at the edges of the top or back of stringed instruments. Adjustable width (spring assisted), direct pressure application upon closure, 2 screws

Material: Nickel-plated brass 

Technical Details: Opening 13 mm, depth 19.5 mm (0.77").

Complete set of 4 joining clamps for closing cracks in arched tops and backs of violins or mandolins. 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: 85-125 mm (3.3"-4.9") / 130-170 mm (5.1"-6.7") / 150-190 mm (5.9"-7.5") / 180 - 220 mm (7.1"-8.7").

Complete set of 4 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: 200-270 mm (7.9"-10.6") / 280-350 mm (11"-13.8") / 290-380 mm (11.4"-15") / 380-450 mm (15"-17.7").