Specifictions- glass clamps are suitable for 3 glass thickness Here 3 sizes for your choice.respectively 6mm to 8mm55 x 33 x 20mm,8mm to 10mm50.80 x 40.64 x 25.40mm,10mm to 12mm63.50 x 40.64 x 25.40mm(HxWxD). Before buying please make sure that the size of the glass clamps matches your glass to ensure your use. Premium Quality- These glass clamps are made of high quality 304 stainless steel which is durable, sturdy, rustproof, waterproof and heat resistant. Perfect choice for indoor outdoor environment. Easy Installation- Glass balustrade clamps comes with 2 Allen keys (Hexagon Drivers). Which make clamp screws easy to lose or tight. Simply insert the glass into the gap and tighten screws. Follow the easy installation steps mentioned in info graphic image. Easy installation will improve your efficiency. Adjustable- Glass holder can be adjusted to the appropriate glass thickness with the help of 2 rubber layers and micro adjusting screw. Rubber spacers can stably and securely fixed in glass and provide the safety of use. Widely use for railings, stairs, handrails, etc. 24 or 7 Customer Care- Before placing the order, please measure your glass thickness. If in case the product is damaged or incorrect size, Please go to the ORDER PAGE and send us a message and we will more than happy to assist you with a full Refund or Replacement