From the Manufacturer
BTM99-44252 Bench Top Mortiser-3/4 hp motor, most powerful in class-for more stability, machine has double column construction-head rides on 4 brass bushings (2 on each column) for smoother vertical motion. Compression spring aids in extracting bit from mortised wood. Micro-adjustable fence allows you to fine tune the fence to an exact parallel to the mortise chisel. Special lock down brings fence to parallel after each readjustment. Depth is controlled by a positive stop on a flat on the column. A top stop is included to limit the vertical head movement to the depth of cut in the wood. The arm is adjustable for each operator's comfort. Four brass cap screws in the head can be adjusted to keep an exact perpendicular even after years of use. Three high quality chisels and bits (1/4", 3/8", 1/2") are included with each purchase, a $40.00 extra value. 2 Year Warranty