Key benefits Compatibility and versatility: 11mm dovetail to 21mm Picatinny rail adapter allows mounting of 21mm Picatinny accessories on 11mm dovetail mounts, expanding the range of scopes and sights you can use. Durable and lightweight: constructed from aluminum alloy for lasting strength with low weight, totaling about 115 g (3.48 oz). Flexible mounting geometry: 155 mm (6 inches) in length with 14 slots enables flexible height and angle adjustments to suit different setups. Easy, unobtrusive use: plugandplay design plus a seethrough profile ensures your field of view remains unobstructed during installation and use. Specifications Material: aluminum alloy Weight: approximately 115 g (3.48 oz) Length: 155 mm (6 inches) Slots: 14 Compatibility: converts 11 mm dovetail rails to 21 mm Picatinny rails Installation: plugandplay; seethrough design preserves sight lines Use scenarios Hunting and field use: attach a 21 mm Picatinny optic or accessory to a rifle with an 11 mm dovetail rail for expanded mounting options without changing the base rail system. Precision and adjustment: use the 14slot length to set the optic height and angle for cheek weld and reticle alignment across different shooting positions. Quickchange deployments: swap or add optics and accessories rapidly in the field thanks to the plugandplay design and unobstructed view.