diff --git a/README.md b/README.md
index a320a23..c3f0337 100644
--- a/README.md
+++ b/README.md
@@ -115,7 +115,7 @@ Here's what it looks like.
 ### Assembly
 #### Other Materials Needed
 1. Clear soft/flexible glue or UV curing glue. WARNING: Avoid using any cyanoacrylate-based glue, such as 502. Any glue with a similar smell should also be avoided, as they will leave white smoke marks on the acrylic.
-2. 40x **M2\*6mm** screws, black, for the panel.
+2. 40x **M2\*6mm** (for regular frame) or **M2\*7mm** (for hex nut frame) screws, black, for the panel.
 3. 4x **M3\*8mm** screws, black, for the banner.
 
 ### Step by Step
diff --git a/README_CN.md b/README_CN.md
index 931f272..f2f089c 100644
--- a/README_CN.md
+++ b/README_CN.md
@@ -114,7 +114,7 @@ Ju Pico 有 16 个按钮，所以你需要订购 16 个按钮帽。
 ### 组装
 #### 其他所需材料
 1. 透明软性胶或者 UV 固化胶。警告：避免使用任何氰基胶，比如 502 胶。任何有类似气味的胶也要避免，因为它们会在亚克力上留下白色雾化痕迹。
-2. 40x **M2\*6mm** 螺丝，黑色，用于固定面板。
+2. 40x **M2\*6mm**（普通框体用）或者 **M2\*7mm**（六角螺母框体用）螺丝，黑色，用于固定面板。
 3. 4x **M3\*8mm** 螺丝，黑色，用于标志面板。
 
 ### 步骤