Mega-Electronics-PCB-Drill-St&-Mega-Electronics-700-310-P-This-Mega-PCB-drill-st&-is-ruggedly-built-accurate-&-has-an-adjustable-drill-clamp-designed-to-hold-a-wide-range-of-the-miniature-PCB-drills-currently-on-the-market-P-P-The-adjustable-drill-clamp-incorporates-a-two-position-sprung-hook-system-to-accomodate-both-large-&-small-drill-housings-&-the-clamp-ring-itself-is-spring-loaded-&-flexible-to-hold-housings-that-are-not-round-in-section-The-top-assembly-can-be-raised