Morse Fast Adapt QR provides a quick release arbor system for professionals who consistently use common sizes of hole saws daily. Morse Fast Adapt QR provides a quick release arbor system for professionals who consistently use common sizes of hole saws daily. Features include a precision locking system, compact design, interchangeable with any hole saw. You can Quick Change hole saws in seconds. To assemble the Fast Adapt QR system, first align adapter notches with holes on hole saw cap when fastening together, then align arbor pins with notches on adapter. Next you insert arbor pins into holes on hole saw cap, push adapter pins into arbor to lock into place. Twist clockwise to release. Note: Inserting arbor pins into holes on hole saw cap is not necessary when using small hole saws with the MQR12C adapter. This Fast Adapt QR system is great for Electricians, Marine, Auto Customizing, Siding, Flooring, General Contractors, Plumbing Contractors, Insulation Contractors, Industrial Production and Maintenance and many more industries.