This Trend 334 x 1/2 TCT Aquamac 21 Recessor, cutter, is designed for use with the seal in a wiping mode and comes complete with a guide bearing to reduce setting-up time and simplify machining operations. It is MEC mechanical feed only. Specifications Size 46.3mm diameter x 10.3mm cut shank 1/2in TCT. D 46.3 mm. D2 4.3 mm. C 10.3 mm. C2 2.7 mm. OL 90 mm. B 28.6 mm.