HomeAdaptors for Core Drilling Adaptors for Core Drilling Showing all 2 results Sort by popularity Sort by average rating Sort by latest Sort by price: low to high Sort by price: high to low Random £52.50 Wet Core Extension Bars – 1″ 1/4 UNC Male to 1″ 1/4 UNC Female Hex. Shank – 550mm Store: DTW Tools & Machinery Add to compare £42.50 Wet Core Extension Bars – 1″ 1/4 UNC Male to 1″ 1/4 UNC Female Hex. Shank – 400mm Store: DTW Tools & Machinery Add to compare