These Professional jewellers saw frames are imported high quality German saw frames and are used with piercing, flat, and spiral saw blades. Each one has a quality forged frame in the traditional style with hardwood handles. Frames are adjustable and have serrated clamps that hold blades firmly. Locking is by a thumb screw. Saw Frame with a 7.5 inch throat depth. Contoured handles are comfortable to hold and made of durable hard wood. Adjustable frames for different saw blade lengths and tensions. Serrated clamps hold saw blades firmly. Premium saw frames are forged from hardened tool steel.