{"product_id":"rockmore-st58-drop-centre-retrac-bits","title":"Rockmore ST58 Drop Centre Retrac Bits","description":"\u003cp\u003eDrop centre retrac bits for ST58 drill strings. A drop centre drills straighter holes in medium to hard rock. Retrac skirts help in broken ground, keep holes straighter and make the bit easier to retrieve. Diameters from 3-1\/2 in (89 mm) to 5 in (127 mm). Hemispherical or semi-ballistic carbide.\u003c\/p\u003e","brand":"Rockmore","offers":[{"title":"3-1\/2 in (89 mm) \/ Hemispherical, 8×7\/16 + 4×7\/16","offer_id":67689592094972,"sku":"ST58-89BRTDC-367","price":0.0,"currency_code":"USD","in_stock":true},{"title":"3-1\/2 in (89 mm) \/ Semi-ballistic, 8×7\/16 + 4×7\/16","offer_id":67689592127740,"sku":"ST58-89BRTDCB-368","price":0.0,"currency_code":"USD","in_stock":true},{"title":"3-11\/16 in (93 mm) \/ Semi-ballistic, 8×1\/2 + 4×1\/2","offer_id":67689592160508,"sku":"ST58-93BRTDCB-3746","price":0.0,"currency_code":"USD","in_stock":true},{"title":"4 in (102 mm) \/ Hemispherical, 8×9\/16 + 4×1\/2","offer_id":67689592193276,"sku":"ST58-102BRTDC-438","price":0.0,"currency_code":"USD","in_stock":true},{"title":"4 in (102 mm) \/ Semi-ballistic, 8×9\/16 + 4×1\/2","offer_id":67689592226044,"sku":"ST58-102BRTDCB-257","price":0.0,"currency_code":"USD","in_stock":true},{"title":"4-1\/2 in (115 mm) \/ Hemispherical, 8×9\/16 + 4×9\/16","offer_id":67689592258812,"sku":"ST58-115BRTDC-474","price":0.0,"currency_code":"USD","in_stock":true},{"title":"5 in (127 mm) \/ Hemispherical, 8×5\/8 + 4×5\/8","offer_id":67689592291580,"sku":"ST58-127BRTDC-089","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0825\/9030\/2460\/files\/thb-st58-p36-2_426b4b30-62eb-44a2-bc9b-cd9d4a4f4526.jpg?v=1791835864","url":"https:\/\/frankdrill.com\/products\/rockmore-st58-drop-centre-retrac-bits","provider":"FrankDrill","version":"1.0","type":"link"}