* 【STRONG LOAD BEARING】Double wheel design, 48mm diameter, bring stronger load bearing, simple installation and convenient use. * 【STABLE】Sliding door hardware V shaped groove wheel come with stable structure, excellent performance and long service life. * 【SMOOTH OPERATION】Groove wheel come with V shaped bracket design to operate more smooth, fluent without lag, very reliable. * 【VARIOUS USES】The stainless steel double wheel is suitable for guide rails, rolling gates, sliding doors, industrial machinery, wire rope track devices