SUPERIOR GRIP - Designed for T-12 LED tubes (38-42mm), this clamp ensures a secure hold, preventing slippage and maintaining stable positioning for your lighting setup. MAXIMUM DURABILITY - Constructed from high-quality aluminum and rubber, this clamp withstands rigorous use, offering long-lasting reliability in demanding environments. VERSATILE APPLICATION - Ideal for various photography and studio setups, this clamp adapts to different mounting needs, enhancing your creative lighting possibilities. SECURE LOCKING - The robust locking mechanism guarantees a firm and unwavering grip, providing added safety and stability for your valuable lighting equipment.