Products Frames Sherlock® Frame MOST DURABLE, MOST TRUSTED Professional-Grade Durability Retaining Spring Locks Roller Cover in Place, Allows Hands-Free Release Chrome-Plated 5/16” Shank, 90-Degree Angle Smooth Rolling Bearings, Heavy-Duty Fiberglass-Reinforced Nylon Cage Pro Grip Handle Compatible with Sherlock GT® & Standard Threaded Extension Poles Products Frames Sherlock® Frame Cat. No.Core LengthCore SizeUPC 0-71497-Qty.Cat. No.R017Core Length: 4Core Size: StandardUPC: 0-71497-13609-1Qty.: 6Cat. No.Core Length: 7Core Size: StandardUPC: 0-71497-12534-7Qty.: 6Cat. No.Core Length: 9Core Size: StandardUPC: 0-71497-69079-1Qty.: 6Cat. No.Core Length: 14Core Size: StandardUPC: 0-71497-16779-8Qty.: 6