ProDec 4 inch Mini Paint Roller Frame Compatible with All Rollers 10 long, Universal 6mm Diameter Chrome Push Fit Bar Trade Quality Handle, Navy Grey

Amazon

Mini roller frame compatible with all 4" mini rollers 6mm diameter rust-resistant chrome plated bar Robust handle with thumb grip profile and hanging hole for storage Push fitting for extension pole 10" (250mm) long, Manufacturer: Rodo Ltd

Zoro Tools

For use with 4" mini roller refills. Push on/pull off, no screws.