This trimmer with a shank mounted bearing, are ideal for template guidance. Use for rebating & trimming edges only. Extra care must be taken to avoid cutter breakage. specification:. D=16mm. C=19mm. Shank diameter=8mm. alternatives::. Trend guided profiler 15.9mm diax 19mmcutm tr_46/92x 1/4tc. spare parts::. Trend bearing 16mm dia x 8mm bore tr_bb 16. Trend collar pack for 8mm shank cutters tr_coll/8.