Product name: Knock blocks for floor mounting Product size:15*11.3cm, 15*10cm Product material:nylon Product features: 1.The dimension of Knock blocks s 15*11.3cm, 15*10cm. 2.This Knock blocks Is made of high-quality nylon,It is stronger, more wear-resistant. 3.This Knock blocks has a unique design,It ensures prolonged use without causing hand fatigue. 4.This Knock blocks fit for tasks involving laminate flooring, wood flooring and particleboard flooring. 5.You will receive 1pcs Knock blocks,which can meet your daily need. Precautions: 1. As we all know , the different computers display colors differently, the color of the actual item may vary slightly from the following images. 2. If you feel difficult to choose the size, you can feel free to contact mewe will give you some suggestion, but it is for you reference only. Shipment includes: 1pcs Knock blocks