Additional Details ------------------------------ Product description: The Super-Flex Shaft is specially designed with extra flexibility, high precision and accuracy. It's easy and quick "S"ecure and"R"elease mechanism. In addition, it's convenient twist or component construction allows easy and quick handpiece, coupler, inner shaft, outer sleeve replacement. * Specially designed with extra flexibility, high precision and accuracy * Easy/Quick "S"ecure and "R"elease mechanism * Convenient twist or component construction allows easy and quick handpiece, coupler, inner shaft, outer sleeve replacement Snap-Lock - No extra tools needed. Just turn the Red-dot on the handpiece to "R" for bit insertion or removal (fig 3) Just turn the Red-dot on the handpiece to "S" position and the bit is secured (fig 4) That's all it takes to get you ready for next service.