Adjustable in 25 mm increments which leaves a potential gap of 20 mm between insert and drawer side- rectified by drilling more holes for the adjustment Centre tray sits inside two seperate outer trays leaving a gap for cutlery however there is a gap of 15mm between centre tray sides and the bottom trays which cutlery can slide under.- rectified by glueing plastic blanks to the fill the gap. Not a good design or value for money . Would not recommend