A special German sliding transfer bevel gauge made by Vogel Tools. The blade is made of hardened steel, & body is made of heavy duty aluminum construction with profile grooves, & has a nice solid feel in the hand. The blade can be securely fixed in place with the locking wing-nut & screw on the body. A great & handy tool for angle layouts & measurements.   Made in Germany. Vogel Sliding T-Bevel Gauge