C.S. Osborne Caning Chisel. The specially designed tool for removing old spline from chairs. Hardened and tempered steel. Has a translucent cellulose acetate handle. Made in USA. Width of point : 1/8" Blade length : 4" Overall length : 8" C.S. Osborne Caning Chisel. The specially designed tool for removing old spline from chairs. Hardened and tempered steel. Has a translucent cellulose acetate handle. Made in USA. Width of point : 1/8" Blade length : 4" Overall length : 8" C.S. Osborne & Co. is a manufacturer of specialized hand tools designed exclusively for upholsterers, auto trimmers, awning and canvas workers, furniture makers and other professionals in related trades. For generations, the family run business has always taken great pride in engineering the highest quality tools and offering our products both here in the United States and abroad. C.S. Osborne produces the most extensive line of custom tools available -and we guarantee that our tools will deliver excellent quality and superior performance.