Right Hand Drill TCT Lip and Spur. Used in conjunction with the TTPMC range producing perfect drill and countersinking to take plug produced by TTPMC plug cutter. Drilling machines only - not for use on portables. DESCRIPTION Lip and Spur. Used in conjunction with the TTPMC range producing perfect drill and countersinking to take plug produced by TTPMC plug cutter (see below). Drilling machines only - not for use on portables. All drills 20mm long. TTCSD8 (1/4 inch Shank) and TTCSD9.5 (10mm Shank): Countersink Diameter D=9.5mm (matches plug produced by TTPMC8), Drill Diameter d=4.8mm, No. 8 Wood Screw TTCSD10 (1/4 inch Shank) and TTCSD12 (10mm Shank): Countersink Diameter D=12mm (matches plug produced by TTPMC10), Drill Diameter d=5.5mm, No. 10 Wood Screw TTCSD12 (1/4 inch Shank) and TTCSD16 (10mm Shank): Countersink Diameter D=16mm (matches plug produced by TTPMC12), Drill Diameter d=6.35mm, No. 12 Wood Screw