Somma Tool is closed due to a water main break in Waterbury. We are sorry for this inconvenience. Hopefully, it will be fixed soon.
The freedom to choose the holders and inserts that best suit your production requirements.
STA
Single-Use
"Throw-Away"





  • Economical holders
  • Compact yet rigid design
  • 0° or 5° top rakes
  • Carbide and HSS inserts
  • Simple back-up anvil
STA VS. CONVENTIONAL DOVETAILS
CONVENTIONAL DOVETAILS
  • Dovetails become shorter when sharpened and must be re-centered each time.
  • Re-centering a dovetail on a screw machine is not very efficient or cost effective.
  • You will need to purchase more than one tool to reduce machine down time.
STA
  • Initial set up is the same as for a conventional dovetail.
  • The insert remains on center in the holder even after sharpening.
  • Can be used for a family of parts without re-centering or making lateral adjustments.
  • Drop-in shave holders available.
STA VS. COMPETITORS’ SINGLE USE
COMPETITORS’ SINGLE USE
  • Expensive complex holders
  • Expensive backup anvil
STA
  • Simple backup spacer rigid enough but economical enough.
  • Buy a set of 10 inserts and get a free holder.



GET STARTED WITH STA
Holders & Inserts