Practical Watch Back Cover Opener Adjustable case Remover Watch Repair Tool Yellow DIY ToolsMaterial: Metal+PlasticSize: 5.4cm x 4.5cm x 2.5cm/2.13″x 1.77″x 0.98″ (Approx.)This adjustable case holder will hold any watch case with outer diameter from 15mm to 50mm.With non-scratching pins, strong plastic base, steel frame and turning knob, this quality watch case hold is made to last.Can be set in different positions for different size cases.