SCHAEFER Spring-Loaded Block fits 1" Track, Stainless Cheeks Product Type_Exit Plates Both models route the attachment

Both models route the attachment line through the blockhead and sheave

and a self-aligning head to reduce friction and increase efficiency by up to 40%

All dimensions are center-to-center

This is thanks to composite fiber-reinforced sideplates

or Ball bearing sheaves (706 series)

SCHAEFER Spring-Loaded Block fits 1" Track, Stainless Cheeks Product Type_Exit Plates Both models route the attachmentSchaefer Spring Loaded Block provides full rotation and articulation. Schaefer Stand up spring block for 1" T Track with Delrin sheave ensures smooth operation and high safe working load. Anodized aluminum cheeks and stainless steel slider allows for effortless running. Polyethylene liner and pin stop allow for easy adjustment. Used extensively for sheet blocks on small to mid sized keelboats, and as control line blocks for larger offshore boats.