Explanation of the abbreviations: S = Shank dia.L = Shank length Colour code system of abrasive disc holders: W (soft) = grey M (medium) = blue H (hard) = red - Adapter The abrasive disc holder can be replaced by suitable adapters.This enables the abrasive disc holder to be mounted directly to the drive spindle.The following adapters are available: AF 14-1/4, EAN (4007220302026) Female thread M14, male thread 1/4-20 UNC.Suitable for drives with spindle M14.SPV-20 CD 1/4-20 UNC, (EAN 4007220333167) Female thread 1/4-20 UNC, male thread 1/4-20 UNC.Suitable for drives with spindle 1/4-20 UNC e.g.for PW 3/120 DH.Ordering note: More detailed information and ordering data for adapters can be found in Catalogue 209.