Features & Specifications: Adjustable clamping/holding range. Good wear resistance. Holding range: M1-M10: such as M1, M2, M2.5, M3, M4, M5, M6, M7, M8, M9, M10 1/16''-3/8'': such as 1/16'', 1/8'', 3/16'', 1/4'', 5/16'', 3/8'' Package included: 1pc Tap wrench/holder M1-M10 (1/16''-3/8'').