Custom Mould Components??Slide Retainers Type:SSLK-8A,SSLK-25A,SSLK-50A Material:SKH51 Hardness:68HRC AISI Standard High strength tool alloy construction provides durable production life. Slide-Lock components resist wear over many slide cycles. Slide-Locks are designed to effectively prevent operational slipping of the slide in your mold base.sSLK-8A is rated to carry a weight of up to 8 pounds, sSLK-25A is rated to carry a weight of up to 25 pounds,sSLK-50A is rated to carry a weight of up to 50 pounds.