Based on the ER Spring-Collet / Nut architecture, the Think & Tinker family
of precision collets and nuts was designed to bring the precision and flexibility of
expensive high frequency spindles to low-cost, consumer and professional grade
The snap-together design and eccentric extraction ring prevents collets from
sticking or binding in the tapered spindle bore. Tool removal is consistently
The internal bore of each collet is preloaded to lightly grip the shank of a bit
when it is inserted, preventing tools from falling out or shifting while the nut
is being tightened. Please read Working with ER
Nuts and Collets.
NOTE: These collets MUST be used with Think & Tinker NUTs and WRENCHES! They will NOT work with the nuts and wrenches that are supplied with your router.