✓ Come with a allen wrench, you can tighten the top two screws with it. Then just twist off the below nut by hand,and mount the base on 20mm rail easily. ✓ Built-in anti-slip tape to fix the scope firmly, and also prevent the scope from movement. ✓ They have high profile in height, 0.94 inches from base of mount to bottom of rings. Help you to adjust the sight to a more convenient height. ✓ Double scope mounts can install on all 20mm picatinny/ weaver rail (20mm) solidly. ✓ The scope rings are designed for most diameter 1''(25.4mm) scopes.

Date First Available: June 29, 2017. Best Sellers Rank: #73,584 in Sports & Outdoors. Customer Reviews: 4.5 out of 5 stars 327 ratings 4.5 out of 5 stars. : B073GXHWWW. Style: ?20 Mm 0.94'' High. Part Number: ?LS-XJJD40. Manufacturer: ?EAmber. Material: ?aluminum-alloy. Color: ?20 mm. Brand Name: ?EAmber. Package Weight: ?0.08 Kilograms. Item Package Dimensions L x W x H: ?3.66 x 2.91 x 0.63 inches.