Tribos Mini toolholders and SVL extensions have clamping dia as small as 0.012 in., allowing circuit board tools with straight shanks to be held directly in holder. Utilizing elastic forces of material to clamp tool shank, clamping process can be accomplished within 30 sec via manual SVP-2 or automatic SVP-3 clamping device, together with corresponding reduction inserts. Runout accuracy and repeatability are less than 3 microns, and basic counterbalance is less than 4 g/mm.