Axcel Achieve XP Pro Recurve Sleeve Lock Block Black. Featuring an 8-32 threaded aperture block it allows for quick and easy changes of apertures to suit various shooting conditions. Crafted with high-quality materials this lock block ensures a secure fit and reliable performance making it a valuable addition to any recurve setup. Specifications for Axcel Achieve XP Pro Recurve Sleeve Lock Block: Manufacturer: Axcel Color: Black Features of Axcel Achieve XP Pro Recurve Sleeve Lock Block: Compatible with Axcel Achieve XP Pro recurve sights Ensures stability and secure positioning of the sight Made from durable materials for long-lasting use Standard #8-32 thread for a perfect fit Sleek black finish to match the recurve sight aesthetics Package Contents: Axcel Achieve XP Pro Recurve Sleeve Lock Block Axcel ACPR-RSB-B: Achieve XP Pro Recurve Sleeve Lock Block Black