Adjustable Saw Frame For Ring Sizing & Jewelry Repair. This is a new adjustable saw frame. This is used with piercing, flat and spiral saw blades. The serrated clamps hold the blade firmly in place. Strongly constructed with flat steel frame and a hardwood handle. Thumb screws make adjusting the saw easy. This saw frame is used for cutting all metals, plastic and wood. The throat depth measures approximately 3" (76.2 mm). The handle measures approximately 4 1/4" (107.95 mm) long. It measures approximately 12 3/8" (314.8 mm) long.