With 7/8" Recess and Includes 10mm and 8mm Bolts. You may find more expensive bits but you will not find finer.Available in 2cm Only. Available in Position 1 and 2.A custom and unique shape for increasing your customer option choices. The Single breaker bit is a terrific addition to this semi 45 Degree profile for speed and bit longevity, use first to save shape on Position 1 Bit. Designed to operate on all routers up to 10,000 RPM. Optimal RH-A bit speed- 7,000 for RH-A-30.RH, RH-B & RH-C Shapes also available. Call for details 888-795-0777 CUSTOM PROFILES AVAILABLE UPON REQUEST