These sliding bevel gauges can be adjusted to any angle for marking, transferring, measuring and storing angles. The blade is locked in place via a 3/4" diameter knurled thumbscrew. The wood base is made from plantation grown Indian Rosewood and is 9/16 inch thick, 1 inch wide and 6 inch long. The blade is made from blued spring steel and is 0.040 inch thick, 1 inch wide and 9 inch long Joseph Marples is one of the best-known Sheffield based tool makers and has been manufacturing joiners tools, such as bevel gauges, marking/cutting gauges and squares since the 1840s. The business has remained in the family to this day and continues to be based in Sheffield, England and managed by Tony a 6th generation Marples. Although modern technology is now utilized for many operations, many of the traditions of manufacturing fine hand tools have remained the same using selected materials and hand finishing. The same threads used in their marking gauges today were those used over 100 years ago. These sliding bevel gauges can be adjusted to any angle for marking, transferring, measuring and storing angles. The blade is locked in place via a 3/4inch diameter knurled thumbscrew.