belt transmission (capacity up to 18 and 25 mm.). s: "small", or bench version. m: "medium", or bench drill with intermediate worktable. l: "large", or pillar version. your choice for : multi-purpose use unequalled robust......belt transmission (capacity up to 18 and 25 mm.). s: "small", or bench version. m: "medium", or bench drill with intermediate worktable. l: "large", or pillar version. your choice for : multi-purpose use unequalled robustness complete equipment speed range ease of use low maintenance attractive design value for money where to buy this product contact the manufacturer