Spiral Fluted Taps (for blind hole)Spiral Fluted Taps(for through hole)Spiral Pointed Taps(for through hole)Hand TapsCementedCarbide TapsRoll TapsSpecial Thread TapsSimple Inspection ToolsPipe TapsThread MillsPremium Thread MillsDiesCenter DrillsCentering Tools JIS ⑪ Center Drills / Centering Tools Drill Shank Overall Drilldia.dia.lengthlengthDcDsLℓ JIS ① CD-S(I) Low Helix Center Drills-Type A 60°, (Old JIS Type 1 ) ② Specification ■The CD-S(I) is an old JIS 1 low helix center hole drill suitable for relatively hard materials. ③ ④ TYPE:1 ⑤ Segment:51 ⑥ SizeDc ×θ× Ds Code Dc (mm) Ds(mm) L (mm) ℓ(mm) TYPE MSRP 2.5 × 60゜× 8 C12.5 2.5 8 50 3.5 1 ¥1,790 3 × 60゜× 10 C13.0 3 10 55 4 1 ¥2,830 4 × 60゜× 12 C14.0 4 12 66 5 1 ¥4,030 ⑦ 5 × 60゜× 14 C15.0 5 14 78 6.5 1 ¥6,070 ⑧ ⑨ ⑩ ⑪ JIS ⑪-5 ※ = Specified Distribution Items. Made to order products.