BuyBits Boat Helm Tablet Stand Holder Mount for Apple iPad 4 3 2 1 & iPad Mini Semi-permanent mount base - leave in situ - add tablet as required - Fits rail / bar 16mm-32mm Spring loaded adjustable cradle holds the iPad secure on all four sides. Suitable for iPad 4 3 2 1 & iPad Mini 4 3 2 1 360 degree rotation - view horizontal or vertical. Metal u-bolt base with twin locking nuts - strong & secure. Tightening ring allows position adjustment. Tablet holder will accommodate some styles of light-weight silicon cases / skins.