Nakanishi NSK IR-310 Twist to Open Quick Change Ring Type Handpiece Durston Black Friday The full-color layout paired with

The full-color layout paired with durable construction—including a protective plastic cover and lay-flat spiral binding—makes it a practical companion in the studio or classroom

These broaches follow the English Pattern Broach design and use the Stubs sizing system — a grading standard originating from screw plate markings by Peter Stubs of Warrington

Highly polished working surface for mark-free results

Eliminates sizing discrepancies caused by mismatched tools

Each drill has a shank diameter equal to its cutting diameter

Nakanishi NSK IR-310 Twist to Open Quick Change Ring Type Handpiece Durston Black Friday The full-color layout paired withThe NSK IR 310 is a precision ring type handpiece engineered for quick, tool free bit changes on compatible NSK micromotors. Its twist to open, twist to close mechanism allows for fast collet access without the need for wrenches or additional tools, keeping workflow smooth at the bench. At 3 1 2" long and 1" in diameter, this handpiece offers a balanced, ergonomic profile suited for detailed engraving, grinding, drilling, and finishing work.