Clamping Miter Box With 12" Back Saw, Holds Material Securely For Accurate Cuts, Material Secures To The Base With A Twist Of The Cam Pins, Cuts Miters On 45 Degree & 90 Degree Angles, Face Angle 45 Degree & 22-1/2 Degree Angles, Molded In Storage Compartments Hold Cam Pins & Pencil, Molded Lip On Base Edge For Easy Use Without Mounting, Built-In Saw Stop Prevents Cutting Into Miter Box, Holes In Base For Fastening To Workbench.