Short Gripper II (20K) 4 Hole, "Doriot" Style Handpiece, Compact, well balanced and light weight, providing precise control, No separate attachments needed, one piece assembly, Chuck accepts all standard contra angles and handpiece burs, Quick chuck release 1/4 turn "open-close", Low noise and low air consumption, Variable speed up to 20,000 RPM with equal speeds forward and reverse, Single Handpiece. Warranty by Johnson Promident: 6 months