Abstract: A tool handle permits selective adjustment of a permitted depth of insertion of a blade therein. The tool handle includes a central bore for reception of a blade through a front opening thereof, and an adjustable stop receivable in the bore, the position of which can be selectively fixed along a longitudinal central axis of the tool handle. So positioned, the stop blocks insertion of the blade beyond a fixed point along the bore selected by the user. As the blade is worn and reground, the stop is moved to a position closer to the front opening of the bore, shortening the degree of blade insertion permitted, and thus allowing a constant distance of blade extension to be maintained. Once adjusted, the blade is securable to the handle, to prevent undesirable movement during use of the assembled tool.