Kataba "A" is a fast cutting saw for general carpentry or cutting lumber to length. Kataba "B" is a general purpose saw for cutting plywood and other sheet goods in any direction. Both have .022" thick blades which cut .030" kerf. Kataba "A" has a 10" long 14tpi blade. Kataba "B" has a 10-1/2" long 12tpi blade. The simple screw makes blade replacement a snap. Both are 24-1/2" overall length.