Complete Standard and Professional Bottom Bracket Threading Tools**Threader for BSA 1,370" x 24 tpi*** Art Nr: 720008* EAN Code: 8590831320016With the Threader for BSA 1,370" x 24 tpi you'll generate optimal concentricity of the bottom bracket's thread.* Inner diameter: 16mm**Professional Threader for BSA 1,370" x 24 tpi*** Art Nr: 720140* EAN Code: 8590831320054With the Professional Threader for BSA 1,370" x 24 tpi you'll generate optimal concentricity of the bottom bracket's thread.**Threader for ITAL 36 x 24 tpi*** Art Nr: 720029* EAN Code: 8590831320023With the Threader for ITAL 36 x 24 tpi you'll generate optimal concentricity of the bottom bracket's thread.* Inner diameter: 16mm**Professional Threader for ITAL 36 x 24 tpi*** Art Nr: 720141* EAN Code: 8590831320061With the Professional Threader for ITAL 36 x 24 tpi you'll generate optimal concentricity of the bottom bracket's thread.**Usage Advice:*** Insert both sides of the threader tap simultaneously to avoid canting and damage to the existing thread.* The usage of an appropriate cutting oil is necessary.**Attention: Letters or marks on the tool refer to the tool itself, not the left or right side of the bicycle*** The R on one side of the tool is for chasing a classic right handed thread, so the tool must be turned to the right (clockwise). * The L side of the tool is for the left hand thread of the bottom bracket shell, which must be turned to the left (counter clockwise)